Source: Martha Stewart Kids, Winter 2004
- 2 cups confectioners' sugar
- 4 tablespoons (1/2 stick) unsalted butter, melted and cooled
- 1/4 cup cocoa powder
- 1/4 cup milk
- 1/4 teaspoon pure vanilla extract
Place confectioners' sugar in a medium bowl. In a small saucepan over medium-low heat, melt butter with the cocoa, stirring occasionally with a wooden spoon. Add milk and vanilla, and whisk.