Chocolate butter frosting

Chocolate Butter Frosting 

Ingredients:
 * 1 1/3 cups butter softened
 * 2 ounces unsweetened baking chocolate squares melted and cooled
 * 2 cups powdered sugar
 * 1 1/2 teaspoons vanilla

Directions: Mix butter and chocolate together. Add sugar. Beat in vanilla and milk until right consistency. Variations: Add 1/4 cup chopped nuts