Food contract manufacturing: moving a recipe onto someone else's food line

Scale-up changes the product before it changes the cost

Kitchen quantities and production quantities are different physical problems. Larger vessels heat and cool more slowly, mixing imparts different energy, and ingredients that dissolved easily in a small batch may refuse to. Emulsions break, sauces set differently, baked items brown unevenly. None of this means the plant is careless. It means the recipe was a set of instructions for one person on one piece of equipment, and it now has to become a specification: ingredient grades, addition order, target temperatures held for stated periods, in-process checks and an acceptance standard. That translation is genuine work, and buyers who fail to budget for trials pay for them in rejected batches instead.

Allergen segregation decides which plants can even bid

What else a site runs matters as much as what it could do for you. A plant handling nuts, milk, gluten or sesame cannot make a product claiming their absence without validated cleaning, segregation or dedicated equipment, and many will decline rather than carry the risk. The reverse applies too: if your product contains a major allergen, some sites refuse it because accepting would compromise their existing customers. This single question eliminates candidates faster than price, capacity or location, so ask it first. Precautionary wording on the label is not a substitute, and retailers increasingly reject products carrying it where a segregated alternative exists.

Shelf life is a property of their line, not your kitchen

Any date printed on the pack has to be supported by evidence generated on the equipment and in the packaging actually used. Fill temperature, headspace, seal integrity, cooling rate and the plant's own microbiological background all influence how a product behaves over time, so studies run on samples made elsewhere prove very little. Storage trials take as long as the life you want to claim, which means microbiology rather than marketing sets your launch date. Accelerated work has a place in screening, but a claim defended in front of an enforcement officer wants real-time data from real production stock.

The label stays yours even though you made nothing

Ingredient declarations, allergen emphasis, nutrition figures, origin statements and claims are the responsibility of the business named on the pack. The factory supplies what you need to build them — the specification of what actually went in, analytical results, the batch record — but converting that into a compliant label and defending it belongs to you. Failures cluster in predictable places: an ingredient substituted by the plant without the declaration being updated, a recipe adjustment agreed verbally on the floor, or nutrition values carried across from an earlier formulation. Require that any change to composition triggers written notification before production rather than after it.

Retailer schemes set the entry price for a site

Grocery customers rarely accept product from a plant without recognised third-party certification, and the scheme demanded varies by retailer and by market. That narrows your field before quality or price enters the conversation, and it affects you as well: certified sites carry audit cost in overhead and pass it on, and they will want paperwork from you that an uncertified site never would. Ask which schemes a candidate holds, when it was last assessed and what the outcome was. A site reluctant to share that with a prospective customer has told you something worth listening to.

Frequently asked questions

Can a contract manufacturer make our recipe exactly as we make it?

Rarely on the first attempt and often never in a strict sense. Their equipment applies different heat, shear and timing, so faithfully following the instructions produces a different result. The realistic target is a production version customers accept as the same product, reached through trials tasted against your reference with every adjustment recorded. Brands treating their original bench sample as an unalterable standard tend to spend a long time rejecting batches that were perfectly good.

Who is legally responsible for the label on a product we did not make?

The business whose name and address appear on the pack. That covers accuracy of the ingredient list, allergen information, the nutrition declaration and any claim, regardless of who assembled the goods. Your manufacturer owes you correct information under contract; you owe the market a correct label. This is why composition changes have to be controlled in writing, and why artwork should be checked against the current specification rather than against the previous version of the label.

What is the smallest commitment a food plant will realistically accept?

Usually one complete batch of whatever the smallest suitable vessel holds, plus a full changeover and clean on either side of it. That is a physical limit rather than a commercial preference, and it does not shrink because your volumes are modest. Sites geared to smaller quantities exist and charge for the time accordingly. Before assuming a plant is too large for you, ask what its smallest processing vessel holds, because that defines your entry point far better than the site's total output.