In a large bowl, combine cake mix, water, butter and egg.

Press into a greased 13 X 9 inch baking pan.

Bake at 375° for 20 to 22 minutes or until a toothpick inserted near the center comes out clean.

Sprinkle with marshmallows, peanuts and M&M's.

Bake 2 to 3 minutes longer or until the marshmallows begin to melt.

Cool on a wire rack.

Cut into bars.

*These are easy to make. Kids love them, and they sell fast at bake sales.*