Salted Nut Chews

1 package Pillsbury Plus yellow cake mix
1/3 cup softened butter
1 egg
3 cups miniature marshmallows
2/3 cup corn syrup
1/4 cup butter or margarine
2 teaspoons vanilla
12 oz. peanut butter chips
2 cups Rice Krispies
2 cups salted peanuts

Combine cake mix, butter and egg. Press into a 9 x 13 pan and bake for 15-18 minutes at 350 degrees. Immediately sprinkle with marshallows and put back in oven until they begin to puff. Heat, stirring constantly until melted the corn syrup, 1/4 cup butter, vanilla and peanut butter chips. Remove from heat and stir in Rice Krispies and peanuts. Spread quickly on top of marhsmallow mixture. Cool and cut into bars.