Confectioner's sugar — FDA Serving Size (RACC)
The FDA Reference Amount Customarily Consumed (RACC) for Confectioner's sugar is 30 g, a Sugars and Sweets category for the General (4+ years) population under 21 CFR 101.12 — the basis for its Nutrition Facts serving size.
Confectioner's sugar is measured in bulk, so its FDA label serving size is the RACC itself, expressed as a household measure: 1 cup (30 g) — per 21 CFR 101.9(b)(5)(i).
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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