Food Manufacturers
Ready-to-Eat and Ready-to-Cook lines, packaged curries, gravies, sauces, frozen foods, convenience foods and meal kits that need a standardised shelf-stable gravy base.
Retort product
Ready-to-Use Tomato Gravy Base
A commercial tomato gravy base built for production at industrial scale that still carries the character of a classic Indian gravy. Made from carefully chosen tomatoes, onions, herbs, spices and edible oil, cooked under standardised conditions and retort sterilised — commercial sterility and ambient shelf life, with no artificial preservatives.
Also supplied as commercial tomato gravy base · retort curry base · shelf-stable cooking sauce base · ambient culinary base · Indian sauce base · onion tomato masala base · simmer sauce base · base gravy for restaurant kitchens
Product overview
A finished gravy base, ready to build a dish on
Cooked under standardised conditions and then sterilised by retort processing, the base reaches commercial sterility and ambient shelf life while its flavour, colour, texture and consistency stay where they were set. It works as the cooking base for Ready-to-Eat and Ready-to-Cook meals, packaged curries, sauces and gravies, frozen products, meal kits and institutional catering — simplifying production and holding product quality steady across a commercial run.
- Retort processed
- No added preservatives
- Ambient shelf life
- 1 kg foodservice pouch
- Authentic Indian gravy flavourBuilt from premium tomatoes, onions and carefully chosen herbs and spices, cooked to carry the colour, aroma and texture of a slow-made Indian gravy rather than a thinned tomato paste.
- Consistent quality across every batchFormulated against fixed standards and run on a validated process, so the base behaves the same way on your line and in the finished dish — batch after batch, season after season.
- Improved production efficiencyA traditional gravy is a long process — chopping, sautéing, simmering, reducing. Starting from a finished base removes those hours, along with the labour, the yield loss and the variation that come with them.
- Shelf-stable retort technologyManufactured on a scientifically validated retort process that delivers commercial sterility and ambient shelf life, with no artificial preservatives and no cold chain.
Technical documentation
Product specification, process parameters and trade terms
Composition and physico-chemical parameters, customisation variables, the process flow and its control points, the nutritional declaration and the commercial terms — the data set an NPD, QA or procurement team works from before raising a trial order.
Technical specification
- Product name
- Ready-to-Use Tomato Gravy Base — a commercial tomato gravy base
- Form
- Cooked, thick pourable gravy base, ready to use straight from the pack
- Composition
- Tomato, onion, edible oil, herbs, spices and salt
- Colour and aroma
- Natural tomato red with a cooked masala aroma, held through the cycle and read on a Hunter Lab colorimeter where a numeric target is required
- Soluble solids
- Total and natural tomato soluble solids (°Brix) set and controlled to the agreed specification
- Consistency
- Bostwick consistency measured at a fixed temperature and time, so body is a number rather than an opinion
- pH and water activity
- Equilibrium pH and aw measured on the finished pack — together they decide whether the product is low-acid or acidified
- Preservatives
- None — stability comes from the thermal process and the pack, not from additives
- Process
- Retort sterilization (retort sterilisation) on a validated scheduled process, to commercial sterility — the F0 delivered at the cold spot is established by heat penetration study
- Packaging
- High-barrier retort packaging; retail and bulk foodservice formats
- Storage
- Ambient, no cold chain required. Refrigerate after opening.
- Shelf life
- Ambient shelf life, established for your agreed pack by stability study
- Pack sizes
- 1 kg stand-up foodservice pouch as standard; retail and bulk sizes to your specification
Customisation parameters
- Spice level and heatTuned to the market — mild for export and institutional, sharper for domestic retail
- Oil, salt and sugarAdjusted to your nutrition targets and to the claims you want the pack to carry
- Consistency and bodyPourable through to thick, to suit pumping, filling and the dish it ends up in
- Tomato-to-onion ratioShifts the base between a bright tomato character and a deeper cooked-masala one
- Dietary variantsClean-label, vegan, low-sodium, no added MSG, no-onion-no-garlic (Jain) and allergen-controlled versions
- Dish-specific basesTuned towards makhani, butter masala, kadai, korma, bhuna, rogan josh, chettinad, tikka masala, jalfrezi or a biryani base
- Market certificationsHalal, kosher, organic and other destination-market requirements confirmed project by project
- Pack format and sizeRetail pouch, bulk foodservice pack and formats that match your own filling line
- Supply modelPrivate label, white label, own label, OEM, third-party and contract manufacturing under your brand
- Market-specific buildsFormulation, labelling and documentation adapted to the destination market
Process flow and control points
- Raw material selectionTomatoes, onions, oil and spices received, inspected and released against specification.
- PreparationWashing, sorting, grading and size reduction under controlled hygiene conditions.
- Cooking and blendingCooked and blended to the standardised recipe, with the sauté, simmer and reduction steps held to fixed parameters.
- In-process checkspH, total solids, consistency, colour and sensory checked before the batch moves forward.
- FillingHot filled into high-barrier retort packaging at a controlled fill weight and headspace.
- SealingSealed and seal integrity verified — the seal is as much a part of the barrier as the film.
- Retort sterilizationProcessed on the validated scheduled process until the cold spot has accumulated the required lethality.
- Cooling and incubationCooled under overpressure, dried, then held for incubation to confirm commercial sterility.
- Release and dispatchFinal QC release, coding, batch documentation and dispatch.
Nutritional declaration
Nutritional values are established by laboratory analysis on the finished, processed product — not calculated from the recipe — and declared per 100 g on the pack for the market you are selling into.
- Energy and macronutrientsEnergy, protein, carbohydrate, total sugars, total fat and saturated fat
- Sodium and fibreDeclared per 100 g and per serving where the market requires it
- Naturally present nutrientsTomatoes carry lycopene and onions and spices their own phytonutrients; retention is measured rather than assumed
- Allergen statusDeclared against the allergen list of the destination market
- Label claimsAny nutrition or health claim is checked against what the analysis actually supports
Ask us for the current specification sheet and certificate of analysis for the standard formulation, or for the analysis run on your own customised version.
Regulatory and market compliance
A low-acid thermally processed food is regulated by the market it lands in, not by the market it left. These are the frameworks a tomato gravy base is held to, and the ones your documentation has to satisfy.
- India — FSSAILicensing, product standards, additive limits and labelling for packaged foods under the Food Safety and Standards Act
- United States — 21 CFR 113 and 114Thermally processed low-acid foods in hermetically sealed containers, and acidified foods. Requires an establishment registration and a scheduled process filed with the FDA (Forms 2541 and 2541e), with the process reviewed by a recognised process authority
- United KingdomAmbient food labelling and allergen requirements, with retailers and foodservice buyers typically asking for BRCGS or SALSA certification at the manufacturing site
- European UnionEntry rules for composite products, health certification and a CHED raised in TRACES NT where the recipe carries processed products of animal origin; food information and labelling under Regulation (EU) 1169/2011; IFS Food or BRCGS commonly specified by buyers
- Codex AlimentariusThe international code of hygienic practice for low-acid and acidified low-acid canned foods — the reference most national rules are built on
- Management systemsHACCP and GMP as the operating base, with ISO 22000 or FSSC 22000 where a GFSI-recognised scheme is specified
Certification held at the manufacturing site is confirmed project by project. Tell us the destination market and the retailer or importer you are selling to, and we will confirm what is already in place and what has to be arranged.
Trade and supply terms
- Supply models
- Private label, OEM and contract manufacturing
- Minimum order quantity
- Agreed by pack format and production run — tell us your volume and we will confirm
- Lead time
- Confirmed at order, and driven by pack format, volume and whether the formulation is standard or customised
- Markets served
- India and export — the United States, the United Kingdom, the European Union, the Middle East and other diaspora and mainstream retail markets
- Documentation supplied
- Specification sheet, certificate of analysis (COA), nutritional analysis, shelf-life and stability data, allergen statement and FSSAI licence details
- Export support
- Labelling review against the destination market, health certificate and the paperwork an importing authority will ask to see — including APEDA and IEC registration details where the shipment requires them
- Shipping
- Carton, pallet and container configuration agreed up front; Incoterms confirmed per order
- Samples
- Available for evaluation and line trials before you commit to a production run
- Terms
- Payment and delivery terms agreed per order
Where it goes
What the base is used to make
Applications
- Ready-to-Eat mealsRetort curries and gravy dishes that only need heating
- Ready-to-Cook productsKits where the consumer adds a protein or vegetable
- Packaged curriesRetail SKUs built on a single consistent base
- Sauces and graviesFinished cooking sauces for retail and foodservice
- Frozen productsFrozen meals and components where the base is cooked in
- Meal kitsSubscription and delivery boxes shipping ambient
- Institutional cateringCanteens, caterers and central kitchens producing at volume
Dishes built on this base: butter masala and makhani, kadai, korma, bhuna, rogan josh, chettinad, tikka masala, jalfrezi, dopiaza, chana masala, paneer gravies, dal makhani and biryani bases — and the tomato-led pasta and pizza sauces that sit alongside them on a foodservice menu.
Pack and protection
- High-barrier retort packaging
- Chosen to survive the cycle and to keep protecting the product for the whole of its declared life
- Barrier against oxygen and moisture
- The two drivers behind colour drift, rancidity and texture change on an ambient shelf
- Light and microbial barrier
- Keeps the pigment stable and keeps the sterilised product sterile until it is opened
- Ambient shelf life
- No refrigeration and no cold chain, which is what makes the base viable for both domestic distribution and export
- No artificial preservatives
- Stability is delivered by the thermal process and the pack working together, not by an additive
Heat penetration and seal integrity studies settle which pack suits your volume and your filling line before anything is committed.
The technical side
Thermal processing and tomato-base parameters, in the terms your QA team uses
If you are briefing an R&D, NPD or quality assurance team, or answering an importer’s technical questionnaire, these are the concepts a retort gravy base project is actually built on — and the terms an auditor, a process authority or a co-manufacturer will expect to find in the file.
Thermal process terms
- Commercial sterility
- The state a low-acid product has to reach: no microorganisms capable of growing under normal ambient storage. It is a process outcome, not an ingredient.
- F0 — sterilization value
- Accumulated lethality at the cold spot, expressed as equivalent minutes at 121.1 °C with a z-value of 10 °C. The number the scheduled process is built around.
- D-value and z-value
- The time at a constant temperature to destroy 90 per cent of a target organism, and the temperature change that shifts that time by a factor of ten. Together they turn a time–temperature curve into a lethality figure.
- 12D reduction
- The botulinum cook — twelve logarithmic reductions of Clostridium botulinum spores, the minimum severity a low-acid canned food is designed against.
- Cold spot
- The slowest-heating point inside the pack. In a gravy base it sits in the thickest part of the fill rather than at the seal.
- Heat penetration study
- Thermocouples placed at the cold spot through a full cycle, in the actual pack and fill weight. It is what turns an assumed process into a validated one.
- Come-up time and hold time
- How long the retort takes to reach hold temperature, and how long it stays there. Product keeps cooking throughout both.
- Scheduled process
- The validated combination of time, temperature, pressure, fill weight and pack that delivers commercial sterility for one specific product in one specific container.
- Critical factors
- The characteristics of product, container or procedure that the scheduled process depends on. Change one — viscosity, particulate size, fill weight — and the process has to be re-established.
- Overpressure
- Air pressure applied during the cycle so pouches and semi-rigid packs do not burst as their headspace expands.
- Low-acid versus acidified
- Above equilibrium pH 4.6 a product is low-acid and needs a full sterilization process. Below it, where the recipe allows, the product becomes an acidified food on a milder schedule.
- Seal integrity
- The seal is as much a part of the barrier as the film. Burst, peel and dye-penetration checks sit alongside the thermal data in the validation file.
Tomato base quality parameters
- °Brix and total soluble solidsThe concentration the base is built to; it drives body, yield and how far the base goes in the finished dish
- Natural tomato soluble solidsThe tomato-derived fraction of those solids, the figure buyers use to compare one tomato base with another
- Bostwick consistencyFlow measured over a fixed time at a fixed temperature, so consistency is specified as a number rather than described
- Hot break and cold breakHow the tomato was first heated. Hot break deactivates the pectic enzymes and holds viscosity; cold break keeps more fresh colour and flavour but sets a thinner body
- Hunter Lab colourInstrumented colour, used where red has to be matched across batches rather than judged by eye
- Equilibrium pH and water activityMeasured on the finished pack. Together they decide which thermal process the product actually needs
- Particulate size and loadThe largest particle decides where the cold spot sits and how long the hold has to run
- Headspace and fill weightBoth are critical factors: change either and the heat penetration data no longer applies
- Viscosity, hot and coldMeasured at fill and at ambient. It governs whether heat moves through the pack by convection or by conduction, which changes the whole schedule
- Screen or sieve sizeThe mesh the tomato fraction passes, which sets how smooth or how textured the finished base reads in the dish
- Howard mould countThe standard microscopic count for mould filaments in tomato products — a raw-material quality gate that carries through into the base
- Emulsion and oil separationWhether the oil stays bound through the cycle and across the declared shelf life, rather than splitting on the shelf
Thermal processing is half the work. The other half is the documentation — the scheduled process, the heat penetration data, the microbiological results and the shelf-life study — that lets a co-manufacturer run the product and an authority clear it.
Industries we serve
Supporting diverse food manufacturing industries
The base is developed for food manufacturers, food service providers and commercial kitchens that need authentic Indian flavour, operational efficiency and production that scales.
Restaurant Chains & Central Kitchens
One base cooked centrally and shipped ambient, so the same curry arrives in every QSR, casual-dining and takeaway outlet without a chef rebuilding the masala each morning.
Cloud Kitchens & Delivery Brands
Shorter ticket times and consistent output from a small kitchen, with no overnight prep and no cold chain to manage between locations.
HORECA & Institutional Catering
Hotels, restaurants, caterers, canteens, commissaries and institutional kitchens producing at volume against a fixed cost, a fixed portion and a fixed taste.
Private Label & OEM Brands
Your brand on a formulation developed, validated and manufactured to your specification, pack format and target market.
Food Exporters & International Brands
Shelf-stable at ambient, with export-ready documentation for diaspora retail, ethnic food shops, mainstream grocery, cash and carry and foodservice distributors in the USA, the UK, the EU and the Middle East.
Meal Kit & Convenience Food Brands
A finished gravy component that travels in the box and needs nothing at the other end but heat and a protein.
Ready-to-Cook Solution Providers
Ready-to-Cook kits and cook-at-home ranges where the base carries the flavour and the consumer adds the rest.
Why Food Research Lab
Your partner for retort product development and commercial manufacturing
Food Research Lab brings together food science, retort food processing technology and commercial product development to build shelf-stable products for domestic and international markets. From formulation through to commercial manufacturing, we work with food manufacturers, private label brands, OEM partners, restaurant chains, cloud kitchens and ready meal manufacturers on solutions shaped to their market, regulatory and commercial needs.
- Expertise in retort food processingShelf-stable foods formulated on a scientifically validated retort process that reaches commercial sterility without giving up taste, colour, aroma, texture or nutritive value.
- End-to-end product developmentFormulation, trials, validation, packaging development, shelf-life testing, regulatory work and commercialisation handled by one multidisciplinary team.
- Customised formulation solutionsRecipes built around your market, your price point and your line — domestic or export — rather than adapted from a standard one.
- Consistent manufacturing qualityFixed parameters and in-process controls, so product quality holds across every production batch rather than drifting between runs.
- Shelf-life and stability expertiseAccelerated and real-time stability studies that establish what the shelf life actually is, and what the product looks like at the end of it.
- Regulatory and food safety complianceFSSAI, HACCP, GMP and destination-market requirements addressed as part of the project, with the documentation an auditor or importer will ask for.
- Flexible manufacturing capabilitiesPilot-scale trials through to commercial-scale production support, with private label, OEM and contract manufacturing routes.
- Export-ready solutionsProducts, packs and paperwork built for the market they are shipping to, not retro-fitted once the first container is booked.
In short
Why businesses choose FRL
Ten reasons a manufacturer, a chain or an exporter ends up working with us — and keeps working with us once the first product is on the shelf.
Start a project- Retort processing expertiseShelf-stable food manufacturing, from the thermal process up
- Scientifically validatedFormulation and processing proven, not assumed
- Domestic and export buildsCustomised to the market the product is going into
- Private label, OEM, contractYour brand, our formulation and manufacturing
- Pilot through to commercialTrial batches to full production, supported the whole way
- Shelf-life and stabilityValidation studies that establish the real declared life
- Advanced packaging developmentThe pack chosen and tested alongside the product
- Consistent batch qualityThe same product in every production run
- Technical and regulatory supportCompliance and commercialisation handled with you
- A long-term technical partnerFor manufacturers, chains, cloud kitchens, HORECA and global brands
Questions
Tomato Gravy Base, specifically
What is Tomato Gravy Base?
A cooked, ready-to-use Indian gravy base made from tomatoes, onions, edible oil, herbs and spices. It is the part of a curry that takes the longest to make — sautéed, simmered and reduced — supplied finished, sterilised and shelf stable, so a production line or a kitchen starts from a base rather than from raw material.
What is Tomato Gravy Base used for?
As the cooking base for Indian curries and gravies in Ready-to-Eat and Ready-to-Cook meals, packaged curries, sauces and gravies, frozen products, meal kits and institutional catering. You add the protein, vegetable or paneer and finish to your recipe; the base carries the flavour, colour and consistency.
What is the difference between Tomato Sauce and Tomato Gravy Base?
A tomato sauce is a finished condiment — usually acidified, often sweetened, and eaten as it is. A tomato gravy base is an intermediate: a cooked masala base of tomato and onion with oil and spices, made to be cooked into a dish. The two differ in pH, fat and spice load, which is also why they need different thermal processes.
How is Tomato Gravy Base preserved?
By process and packaging, not by additives. The filled pack is sealed and sterilised in a retort on a validated scheduled process until the product reaches commercial sterility, then held in high-barrier retort packaging that keeps oxygen, moisture, light and microorganisms out. That combination gives ambient shelf life with no artificial preservatives.
Can Food Research Lab customize Tomato Gravy Base formulations?
Yes. Spice level, oil and salt, consistency, tomato-to-onion ratio, pack size and pack format are all adjustable, along with clean-label, vegan, no-onion-no-garlic and allergen-controlled variants. Every change is re-validated — a reformulated base gets its own scheduled process and its own shelf-life study before it goes into production.
Is a tomato gravy base the same as a cooking sauce base or a culinary base?
Broadly yes — the vocabulary changes with the market. In India and among diaspora brands it is a gravy base or masala base; in the UK trade the same thing is a cooking sauce, curry sauce base or base gravy; in the United States and continental Europe it is usually a culinary base, sauce base, flavor base or simmer sauce. All describe a cooked intermediate that a kitchen or a production line finishes into a dish, rather than a condiment eaten as it is.
Do you supply on a private label, OEM or contract manufacturing basis?
Yes — private label, white label, own label, OEM, third-party and contract manufacturing are all available. Your brand goes on a formulation developed and validated to your specification, in your pack format, for your market. Where a co-packer or co-manufacturer is already in place, we can transfer the validated scheduled process and documentation to them instead.
What F₀ value does the product receive, and how is it established?
It is established rather than assumed. Thermocouples are placed at the cold spot of the actual pack at the agreed fill weight, a heat penetration study is run through a full cycle, and the accumulated lethality is calculated as equivalent minutes at 121.1 °C. That figure, with the time, temperature, pressure and fill it depends on, becomes the scheduled process. Change a critical factor — viscosity, particulate size, fill weight, pack — and it has to be re-established.
Do you supply to the USA, the UK and Europe, and what documentation travels with the product?
Yes. Each market has its own frame: the United States regulates the product under 21 CFR 113 for low-acid foods, with an establishment registration and a scheduled process filed with the FDA; the European Union applies its composite product entry rules, health certification through TRACES NT and labelling under Regulation (EU) 1169/2011; UK and EU buyers commonly ask for BRCGS, SALSA or IFS Food at the manufacturing site. The product ships with a specification sheet, certificate of analysis, nutritional analysis, allergen statement, shelf-life data and licence details, plus the health certificate and export paperwork the shipment requires.
What is the minimum order quantity and the lead time?
Both depend on pack format and production run rather than on a fixed list, so tell us the volume, the pack and the market and we will confirm. Samples are available for evaluation and line trials before you commit to a run, and a pilot batch can be produced first where the formulation is being customised.
What is the shelf life, and how is it established?
Ambient, with no refrigeration and no cold chain. The declared figure comes from accelerated and real-time stability studies on the finished pack — microbiological, physico-chemical and sensory — rather than from a rule of thumb, and it is declared for the specific pack the product ships in. A change of film, closure or fill weight means the study is repeated.
More on the process and the machine on the pilot retort processing page
Looking for a reliable tomato gravy base?
Tell us the dish, the pack and the market
Food Research Lab develops and manufactures ready-to-use tomato gravy base, retort processed curry bases and customised food solutions for food manufacturers, restaurant chains, cloud kitchens, HORECA businesses, institutional caterers and ready meal brands worldwide.
- 1Send your requirementThe dish it has to build, the volume and the pack you have in mind.
- 2We come back within two working daysWith a specification, a sample plan and what customisation would involve.
- 3Samples, then supplyEvaluate the base on your own line before committing to a run.
Let’s create something Innovative and Delicious together
Food Research Lab strives for excellence in new Food, Beverage and Nutraceutical Product Research and Development by offering cutting edge scientific analysis and expertise.
