Mars Bar Rice Krispies Squares

3 Mars bars
1/4 cup butter
2 cups miniature marshmallows
4 cups Rice Krispies

Grease a 9-inch square cake pan.

Cut up Mars bars. Combine in a saucepan with butter and marshmallows. Cook and stir over low heat until melted. Remove from heat and stir in Rice Krispies. Pack into prepared cake pan. Cool and cut into squares.