Double only the ingredients that actually double. If a fixed component stays at its original amount, the new recipe total is not simply twice the old total. Record the changed ingredient list first, then sum it.
A fixed-component example
Imagine the main ingredients in a fictional recipe contribute 900 calories and a fixed seasoning mixture contributes 60. The original total is 960. A new batch uses double the main ingredients but the same seasoning amount, giving 1,800 + 60 = 1,860 calories. Multiplying the old total by two would give 1,920 and overstate this example by 60.
Portion count is a separate step
If the new batch is divided into six uniform portions, each has 310 calories under the stated assumptions. The number of portions should describe the new batch, not automatically retain the original recipe’s serving count.
Apply the method to every known nutrient
The fixed seasoning may contribute sodium, carbohydrate or other supported nutrients. Keep those component figures and multipliers separate too. A missing ingredient value remains missing; it does not become known because the rest of the recipe scales cleanly.
This is invented arithmetic, not a kitchen-tested recipe or a recommendation to double food intake. FDA supports the serving-based ingredient inputs and NIST supports measured amounts. The recipe tool can divide a supported batch total once you have built that total correctly. It cannot infer an ingredient-specific exception from a single “double recipe” instruction.
Sources and example boundaries
- FDA: serving information
Serving sizes and household/metric units on U.S. labels.
- NIST: Metric Kitchen
Using appropriate kitchen measurements.
All food figures and prices in the worked example are invented to explain the method. They are not restaurant nutrition, tested recipes, shopping prices or personal dietary advice. Use the current label for the product you actually have.