OEM & Co-packing
Home Recipe to Retort Pouch: What a Co-Packer Locks
Your thick gravy can come out thinner, your vegetables and potatoes softer, and a coconut-milk sauce can split — and none of it is the co-packer’s preference. A retort process is chosen for one formula in one container size and may only be set by a qualified person. Once it is validated your recipe becomes a controlled specification: fill weight, consistency and particle size included. That is why revisions are capped.
This page is part of DapoGo’s guide to halal OEM and co-packing, written by the DapoGo team, a retort food maker with our own factory at Melaka Halal Hub in Serkam, Melaka.
Founders ask what co-packing costs before they ask what they are handing over. The second question decides whether the first answer matters.
The short version
- Pouches run at roughly 115–121°C, 15–20 psi above atmospheric.
- Lethality is measured: one published study ran to an F0 of 3.57 min — the bacterial log reduction a process delivers at a set point.
- Starch depolymerises at that heat, so a thick gravy can come out thinner.
- An inadequate process must be re-established — that is what a revision costs.
On this page10 sections
Who decides the temperature and time your dish is cooked at?
A qualified process authority does. The Codex Alimentarius code of practice for low-acid canned foods defines a scheduled process as the thermal process chosen by the processor for a given product and container size to achieve at least commercial sterility, and requires that it be established by a qualified person with expert knowledge acquired through appropriate training and experience.
So a co-packer who lets you dictate the cook is the wrong co-packer. The heat is severe: the review Understanding retort processing, in Food Science & Nutrition, notes that a cycle must reach 115–121°C at 15–20 psi above atmospheric pressure before the holding stage starts, and that extreme temperature exposure significantly reduces food quality. The mechanics are in our note on what retort processing is.
What exactly gets locked once the process is set?
More than the ingredient list. Codex states that product and filling specifications should contain at least the full recipe and preparation procedures, filling weights, headspace, drained weight, temperature of product at filling, and consistency — and that the scheduled process must state any restrictions on ingredient changes.
Under rotational sterilisation it adds that viscosity rather than consistency becomes the important factor and must be specified. How thick your gravy is has been written into a process document.
And if the process turns out to be inadequate, Codex is unambiguous: it must be re-established. There is no informal adjustment path. That is why revisions are capped, and why you should ask before signing who pays for a re-established process, who owns the data and who owns the formula. Our route is in the DapoGo OEM process.
Why is a small recipe change treated as a process change?
Because heat does not move through every filling the same way. Codex puts it plainly: small deviations from the product and filling specifications which may seem negligible can cause serious deviations in the heat penetration properties of the product. Pouches are the sensitive case — Codex adds that with flexible packaging, variations in particle size, fill weight or headspace may change the filled pouch’s thickness, which may adversely affect heat penetration.
Dice the beef larger and the pouch sits differently in the retort. Packing density makes it concrete. Food Science & Nutrition lists the critical factors a retort process controls, among them packing density which should be 5%–10% more than the nominal weight of the product, drained weight, and viscosity in semi-liquid products. The lethality is measured too: the retorted Pad Thai sauce study processed its pouches at 121°C to an F0 value of 3.57 min. Ask a co-packer what F0 your product would run to.
What changes when a home recipe is retorted?
A home recipe’s sauce body goes first. The Food Science & Nutrition review describes heating and shearing starch granules breaking their hydrogen bonds, depolymerising them and lowering viscosity, so a thick gravy can come out thinner than it went in. Starch and protein-based foods also change their flow behaviour significantly during processing, which is why the outcome is tested, not predicted.
Texture follows the arithmetic. In a static retort, slow heat penetration creates different temperature zones inside one pack, which can overcook it and leave texture and flavour uneven. In the Food Science and Biotechnology study of retorted vegetables, potato measured 3.07 N of hardness after 120°C for 7 min but 3.72 N after 150°C for 3 min: hotter and shorter, at a near-identical thermal dose, held the texture better.
The heat has already changed part of the aroma system before the pouch leaves the retort, and storage continues it more slowly. Kamarudin bin Hasim of KUDEN Academy notes that in storage pigments can shift and aroma compounds can fade or change.
| What changes | Why | Tunable? |
|---|---|---|
| Sauce comes out thinner | Starch depolymerises at that heat | Yes — thickener |
| Vegetables and potato too soft | Texture tracks the thermal dose | Yes — hotter and shorter |
| Flavour uneven | Temperature zones in a static retort | Partly — agitating the packs |
| Oil separates | Unstable emulsion | Yes — stabilisers, antioxidants |
| Aroma can fade or change | Heat changes it, storage continues it (KUDEN Academy) | No — it needs a shelf-life study |
What happens to coconut milk, oil and chilli pastes?
There is a published answer, on a dish close to ours. A PLOS ONE study of southern-style Pad Thai sauce — a thick heritage sauce built on coconut milk and curry paste — found that phase separation and lipid oxidation can occur and subsequently reduce the overall quality of the retorted sauce.
Cooking it longer was not the fix: the sauce only held after reformulation with 2.3% potato starch plus 0.1% xanthan gum in combination with mixed antioxidants.
Drift continues after despatch: in storage a sauce can thicken or thin, oil can separate from the water phase, and vegetable texture keeps softening, according to KUDEN Academy.
What should you settle before the sample stage?
Four things, in writing, and not one of them costs money. Bring all four on day one and the sample stage starts from a specification rather than a guess, not from a co-packer’s best reading of your dish.
- The formula as it was actually made, with weights and the preparation sequence — a specification cannot be validated against "season to taste".
- One attribute nominated as untouchable: heat level, sauce body, or meat texture. The sample stage works to hold that one first.
- The container decision, stated. DapoGo packs in stand-up and pillow aluminium retort pouches, and in glass jars for sambal. Format sets thickness, and thickness sets the heat.
- A storage evaluation plan, not a tasting. As Kamarudin bin Hasim of KUDEN Academy puts it: "Shelf life perlu dimiliki oleh produk melalui data, bukan dipinjam daripada produk lain melalui andaian" — a product’s shelf life has to be owned by that product through its own data, not borrowed from another product by assumption. A good day-one sample settles nothing about month six.
One note that surprises founders: RetortLab Malaysia advises starting the retort within 4 hours of cooking.
What does the sample stage cost, and how long does it take?
DapoGo publishes these figures, which is uncommon here. The sample stage starts from RM3,500 per SKU on your own recipe, or from RM1,500 if you take an existing DapoGo formula. The RM250 consultation fee is deductible from the R&D fee if you proceed within 7 days. The stated stages are a 1–2 day consultation, 2 weeks of sample and taste testing, and 1–2 months of production.
| Stage | Published price | MOQ |
|---|---|---|
| OEM consultation | RM250 per session, 45–60 min | — |
| Private label (existing DapoGo formula) | from RM1,500 / SKU | — |
| Custom R&D retort sample (your recipe) | from RM3,500 / SKU | — |
| Complex product development | from RM5,000 / SKU | — |
| Pilot batch | — | 300–500 pouches / SKU |
| Full production | — | from 1,000 pouches / SKU |
Our policy is a maximum of three recipe revisions per SKU, because each meaningful change reopens the validation above. Costs are in our note on halal food OEM costs, and the route choice in private label versus your own recipe.
Quick answers
Why cap recipe revisions at three?
Because a meaningful change to ingredients or filling changes how heat penetrates the pouch, and Codex requires an inadequate scheduled process to be re-established rather than adjusted. Three per SKU is our stated policy, not a timeline.
Can a co-packer reuse a process from a similar product?
No. A scheduled process is chosen for one product and one container size, and any restrictions on ingredient changes must be stated in it. A near-identical sauce at a different fill weight is a different process.
Which factory does this work?
DapoGo’s own, at Melaka Halal Hub, Plot 31 & 32, Jalan EP Serkam 9, 77300 Serkam, Melaka. DapoGo states its products keep for 24 months at ambient temperature and are ready in three to five minutes.
Where to start
Start with one SKU and one attribute you will not trade. DapoGo publishes 54 products across 7 categories in its own store, so retort is our own process, not an experiment. Our procedure runs from enquiry, consultation and R&D quotation through the R&D sample, approval and pilot batch, to full production — detail on the halal OEM and co-packing services page, other questions in the FAQ. WhatsApp 011-5501 3391.
Sources
- Codex Alimentarius, FAO/WHO: CAC/RCP 23-1979
- Understanding retort processing, Food Science & Nutrition (2024)
- Southern-style Pad Thai sauce in retortable pouches, PLOS ONE (2020)
- Food Science and Biotechnology 32 (2023): retort processed vegetables
- KUDEN Academy: Shelf Life dan Kualiti Produk Retort
- RetortLab Malaysia: 4 Kesilapan Biasa Usahawan Baru
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