frosting
n. C / U B1 Intermediate US //ˈfɹɔstɪŋ// UK //fɹˈɒstɪŋ// frost·ing
n. a sweet, creamy mixture used to cover or decorate cakes and cookies.
n. a sweet glaze or topping, typically made of sugar, butter, and liquid, used to coat or decorate baked goods.
She spread chocolate frosting over the birthday cake.
The bakery is famous for its cupcakes, which are topped with a thick swirl of vanilla frosting.
While a simple glaze provides a light sweetness, a dense buttercream frosting allows for more intricate decorative piping and a richer mouthfeel.
From frost + -ing.
Usage
Uncountable when referring to the substance in general; countable when referring to specific types or varieties.