BASE:

1 pkg. Pillsbury Plus chocolate mint cake mix
1/3 c. butter
1 egg

Combine until crumbly and press in 15"x10" jelly roll pan. Bake at 350 degrees for 10 minutes. Set aside to cool.

FILLING: Dissolve 1 envelope unflavored gelatin in 1/4 cup boiling water. Add 4 cups confectioners' sugar, 1/2 cup soft butter, 1/2 cup Crisco, 1/4 teaspoon peppermint extract and 2 or 3 drops green food coloring. Beat until creamy. Spread on base. Chill.

FROSTING: Melt 6 ounces chocolate chips and 3 tablespoons butter. Spread over filling and chill until firm. Makes about 30 bars.