- 1 cup powdered sugar = 1 cup granulated sugar + 1 tbsp cornstarch, blended on high for 1–2 minutesWon't be as fine as commercial powdered sugar but works for icings, dustings, and frostings. Sift before using to break up any clumps.
Powdered sugar substitutes
Tested swaps for powdered sugar, with ratios and sources.
Measure substitutes by weight where you can. The Powdered sugar converter gives the grams.
Note: our substitutions are direct, not chained — we don't recommend substituting a substitute.