powdered sugar
US /ˈpaʊ.dɚd ˈʃʊɡ.ər/
UK /ˈpaʊ.dɚd ˈʃʊɡ.ər/

1.
zucchero a velo, zucchero impalpabile
a finely ground sugar, often with a small amount of cornstarch added to prevent caking, used in icings, confections, and as a dusting for baked goods
:
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She dusted the freshly baked cookies with powdered sugar.
Ha spolverato i biscotti appena sfornati con lo zucchero a velo.
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The recipe calls for two cups of powdered sugar for the frosting.
La ricetta richiede due tazze di zucchero a velo per la glassa.