Fudgy Chocolate Frosting

Ingredients:

1/2 cup (1 stick) butter, softened

1 1/2 cups confectioners' sugar

3 ounces (3 squares) unsweetened chocolate, melted

2 teaspoons vanilla extract

Directions:

In a medium bowl, beat butter and confectioners' sugar at medium speed until light and fluffy. Add melted chocolate and vanilla; continue beating until shiny and smooth. Spread frosting on cake.