icing sugar
US /ˈaɪ.sɪŋ ˌʃʊɡ.ər/
UK /ˈaɪ.sɪŋ ˌʃʊɡ.ər/
1.
very fine powdered sugar, used for making icing and decorating cakes
:
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Sift the icing sugar before mixing it with butter for the frosting.
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She dusted the cake with a light coating of icing sugar.