1 box yellow cake mix
1 stick butter
Mix together until well blended and press in lightly greased 9x13 pan. Bake 375 for 16 minutes or until toothpick comes out clean.
Immediately top with:
1 cup M&M's
1/2 cup cocktail peanuts
3 cups mini marshmallows
Bake an additional 2 minutes or until marshmallows begin to melt.
Let cool completely and cut in bars.