Salted Nut Roll Bar

1 yellow cake mix
1 egg
3/4 c. melted butter (divided)
3 c. miniature marshmallows
12 oz peanut butter chips
1/2 c. corn syrup
1 tsp vanilla
2 c. peanuts
2 c. Rice Krispies
1. Mix the cake mix, egg and 1/4 c. butter. Press into a greased 9x13 pan. Bake for 10-12 minutes at 350 degrees.
2. Put the marshmallows on top of the hot crust. Return to oven for 3 minutes or until puffed up.
3. Melt the peanut butter chips, corn syrup and 1/2 c. butter. Add vanilla and mix. Then add the peanuts and Rice Krispies. Mix well.
4. Pour over marshmallows. Refrigerate, but make sure to cut before they get to hard!