Fun Marshmallow Bars (reduced sugar)

1 pkg. sugar free chocolate cake mix 1/4 cup water 1/4 cup melted butter 1 egg 3 cups mini marshmallows 1 cup m&m's 1/2 cup chopped peanuts, cashews or whatever nut you like 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 20-22 minutes or until a toothpick inserted near the center comes out clean. Sprinkle with marshmallows, m&m's and nuts. Bake 2-3 minutes longer or until the marshmallows begin to melt. Cool on wire rack and cut into bars.