Confectioners' sugar
Very finely ground white sugar mixed with a little cornstarch, used for icings, glazes, dusting and smooth frostings. Also called powdered or icing sugar.
- Baking ingredients and additives
Also called: powdered sugar, icing sugar, 10X sugar
The cornstarch, usually about 3%, keeps the fine sugar from clumping. Because it dissolves instantly, it makes smooth, grit-free buttercream, glazes and royal icing. It doesn't replace granulated sugar one-for-one in batters.
Sift it before using to remove lumps, and dust it over desserts through a fine sieve just before serving.
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Written by VanillaGoods in our own words from these sources. Last reviewed October 15, 2026.
- Confectioners' sugar (Q151070), Wikidata