BASE:

1 yellow cake mix
1/3 c. butter
1 egg

TOPPING:

2/3 c. corn syrup
1/4 c. butter
2 tsp. vanilla
12 oz. peanut butter chips
2 c. crisp rice cereal
2 c. salted peanuts

Mix ingredients for base and press in bottom of ungreased 13"x9" pan. Bake at 350 degrees for 12 to 18 minutes. Sprinkle 3 cups of miniature marshmallows on top. Heat topping ingredients in large saucepan until all mixture is melted (except for cereal and nuts). Then add cereal and nuts. Pour over base. Chill, cut into bars.