Preheat oven to 350º. Mix cake mix and butter until well blended. Add egg and beat until all mixed together.press dough into the base of 9X13" pan. Bake 12-14 minutes. And edges are light brown or until set.

Add marshmallows to the top & return to oven 1-2 minutes. Until marshmallows are puffed up. Remove from oven.

Combine corn syrup & sugars in a sausepan on medium heat. Stir for a few minutes. Until mixture begins to boil.remove from heat. Stir in peanut butter & vanilla until smooth. Add cereal & peanuts & corn. Mix well. Pour over marshmallows. Let cool. Cut into bars or squares.