noun
frosting; icing; sugar coating
Refers to a sweet coating made of sugar, used on cakes, pastries, or confections. Common in cooking contexts.
ケーキに砂糖衣をかける。
I put frosting on the cake.
ドーナツの砂糖衣が甘くて美味しい。
The sugar coating on the donut is sweet and delicious.
グレーズ is a loanword for 'glaze', which can be sugar-based but may also include other ingredients. 砂糖衣 specifically emphasizes sugar as the main component.
Compound of 砂糖 (satō, 'sugar') and 衣 (koromo, 'clothing' or 'coating'), literally 'sugar clothing'. The reading ごろも is a rendaku form of ころも.