Martha Louise Stewart's Chocolate Icing
- 1 large egg
- 2 1/2 cups confectioners' sugar
- 2 teaspoons cocoa powder
- 1 teaspoon pure vanilla extract
- 2 tablespoons unsalted butter, melted
In the bowl of an electric mixer fitted with the paddle attachment, beat egg with 1 cup sugar on low speed. With mixer running, add 1/2 cup sugar and cocoa into egg mixture; mix well. Add remaining 1 cup sugar, vanilla, and butter; beat to combine.