Cakes — FDA Serving Size (RACC)
The FDA Reference Amount Customarily Consumed (RACC) for Cakes is 80 g, a Bakery Products category for the General (4+ years) population under 21 CFR 101.12 — the basis for its Nutrition Facts serving size.
For a 320 g whole item, the fractional serving that most closely approximates the 80 g RACC is 1/4 slice (80 g), about 4 servings per item — per 21 CFR 101.9(b)(2)(ii).
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Authoritative sources: 21 CFR 101.12 — reference amounts (RACC), 21 CFR 101.9(b) — serving-size conversion, and FDA: Serving Size on the Nutrition Facts label.
For informational purposes only; verify against 21 CFR 101.12 / 101.9(b). · US Nutrition Label Rules v1.3.0 · CFR snapshot 2026-02-12