1 pkg. (18.25 oz.) yellow cake mix
1/3 cup softened butter
3 cups miniature marshmallows
2/3-cup light corn syrup
2 cups peanut butter chips
¼ cup butter
2 cups Rice Krispies (I didn't have Rice Krispies, so I used Special K)
2 cups salted peanuts
Heat oven to 350 degrees. In large bowl, combine all base ingredients, except marshmallows, at low speed. Press in ungreased 9 x 13 pan. Bake at 350 degrees for 12-18 minutes, until golden brown. Remove from oven and immediately sprinkle with marshmallows. Return to oven 1-2 minutes or until marshmallows begin to puff. Cool while preparing topping.
In large saucepan, heat corn syrup, butter, vanilla and chips just until melted and mixture is smooth. Remove from heat and stir in cereal and nuts. Immediately spoon warm topping over marshmallows and chill.