Last verified 21 Sept 2026 · generated from 21 CFR 101.9(b) and 101.12(b) by the NutriLabels serving engine · Sources
Sponge cake serving size: a fraction of the whole, decided by how much the whole weighs. FDA files sponge cake under “Cakes, lightweight (angel food, chiffon, or sponge cake without icing or filling)”, reference amount 55 g. A product that is usually cut before eating declares the fractional slice (1/8, 1/12 and so on) that comes closest to the reference amount (21 CFR 101.9(b)(2)(ii)).
The declaration
| FDA category | Bakery Products: Cakes, lightweight (angel food, chiffon, or sponge cake without icing or filling) |
| Reference amount (RACC) | 55 g |
| FDA label statement | __ piece(s) (__ g) for distinct pieces (e.g., sliced or individually packaged products); __ fractional slice (__ g) for large discrete units |
| Single-serving container | Any package under 110 g (3.9 oz) is one serving: the whole package is the serving size (21 CFR 101.9(b)(6)). |
| Dual-column panel | Packages holding 110 g–165 g (3.9 oz–5.8 oz) must show a second column for the whole package (21 CFR 101.9(b)(12)). |
How the fraction is decided
| If the whole weighs | The serving is |
|---|---|
| 330 g | 1/6 whole (55g) |
| 550 g | 1/10 whole (55g) |
| 770 g | 1/15 whole (51g) |
Only 1/2, 1/3, 1/4, 1/5, 1/6 and fractions made by dividing those by 2 or 3 are permitted (1/8, 1/9, 1/10, 1/12 …). The one whose slice comes closest to the reference amount wins; an exact tie goes to the larger slice.
What this means for your label
- Cups are written in 1/4- or 1/3-cup steps; tablespoons as 1, 1 1/3, 1 1/2, 1 2/3, 2 or 3; teaspoons as 1/8, 1/4, 1/2, 3/4, 1 or 2 (21 CFR 101.9(b)(5)(i)). Any other increment is not permitted.
- A package under 110 g is one serving no matter what: the panel reads “1 serving per container” and the serving size is the whole package.
- All the nutrient values on the panel are per this serving, rounded by 21 CFR 101.9(c). Change the serving and every number changes with it.
Free to build and preview. The print-ready label is $29 for one product, with the serving size, ingredient statement and allergen declaration worked out from the regulation.
Also covers
chiffon cake: all filed under the same FDA category, so the same serving applies.
Related serving sizes
- Angel food cake: a fraction of the whole (RACC 55 g)
Sources
- 21 CFR 101.12: Reference amounts customarily consumed per eating occasion (Table 2).
- 21 CFR 101.9(b), serving size: (b)(2) the three procedures, (b)(5) how the measure is written, (b)(6) single-serving containers, (b)(8) servings per container, (b)(12) dual column.