Turning a recipe into a product
Updated
On this page5
What has to change
A recipe that makes good jam at home is not yet a product, and the gap is not about quality. A product has to meet a ratio, carry a name it is entitled to, and be reproducible by somebody other than you. Most family recipes fail at least one of those and the first one is the usual culprit.
- Convert every quantity to weight. The standard is a ratio by weight and a recipe in cups cannot be checked against it.
- Check the ratio. At least 45 parts fruit to 55 parts sweetener, 47 for Group I fruits.
- Fix a doneness test and a target reading, rather than cooking until it looks right.
- Fix a jar size by weighing the product into it.
- Write the whole thing down as a specification, not as instructions.
Why the family recipe often fails the ratio
Home recipes are written for taste and the standard is written as a proportion, so the two can disagree without the jam being wrong. This is worth checking before anything else, because the answer decides what the jar can be called.
Because old recipes were written for keeping rather than for a standard, and many of them are sugar-heavy in a way that is fine, or fruit-light in a way that is not. Weighing it once tells you which.
What you are allowed to add
The standard names the permitted optional ingredients, and anything outside that list takes the product out of the standard. A family recipe with an unusual addition may be a fruit spread rather than a jam, which is a labeling consequence rather than a fault: what else the standard lets you put in.
The thing worth protecting
Something in the original is worth keeping through all of this, and knowing what it is prevents standardizing the product into something nobody wanted.
The flavor, which is why you are doing this. Everything above is about making it repeatable and legal, and none of it should change what the jam tastes like.