Mix first 3 ingredients together with mixer until crumbs form and press into a greased 9X13 pan. Bake 10-12 minutes at 350.
Remove and sprinkle marshmallows over top. Return to oven for a few minutes until marshmallows begin to puff. Cool completely.
Heat next 4 ingredients in saucepan until smooth. Add rice krispies and peanuts and mix well. Pour over marshmallows and chill before cutting into small squares.