3/4 cup butter or margarine, melted 1 1/2 cups granulated sugar 1 1/2 teaspoons vanilla extract 3 eggs 3/4 cup all-purpose flour 1/2 cup cocoa 1/2 teaspoon baking powder 1/4 teaspoon salt 1 container vanilla ready-to-spread frosting (about 1 1/2 cups) Green and red food coloring Chocolate chips for "seeds"
Preheat oven to 350 degrees F. Line a 12-inch pizza pan with foil; grease foil. If using a disposable pan, place on a cookie sheet to bake.
Use only a spoon to beat together the melted butter, sugar, vanilla and eggs in a large bowl. Stir in dry ingredients until well blended. Spread into prepared foil-lined pan. Bake 20 to 25 minutes or until top springs back when touched lightly. Cool completely.
Stir several drops of green food coloring into 1/2 cup frosting; spread on outer 1 1/2 inches of brownie to form the green rind. Place 1/4 cup vanilla frosting in a plastic bag; cut a tiny piece from corner. Pipe a band of white rind inside the green rind.
Stir together remaining frosting and red food color to form pink flesh of melon; spread inside entire middle. Place chips on for seeds. Cover; refrigerate until firm. To serve, cut into wedges.
