Mint Chocolate Cake

1 package (18 1/4 ounces) chocolate cake mix

Frosting:
1/2 cup butter, softened
2 cups confectioners' sugar
1 tablespoon water
1/2 teaspoon peppermint extract
3 drops green food coloring
Topping:
1 1/2 cups milk chocolate
6 tablespoons butter, softened
1/4 teaspoon peppermint extract

1. Prepare cake batter according to package directions, using a greased 9x13 baking pan
2. Bake at 350 for 25-30 minutes or until a toothpick inserted near the center comes out clean. Cool on a wire rack.
3. In a large bowl, combine frosting ingredients until smooth. Spread over cooled cake.
4. For topping, in a microwave, melt chocolate chips and butter; stir until smooth. Stir in extract. Spread over frosting. Refrigerate until set.

You can make brownies and use this frosting.