1 c. butter
1/2 c. peanut butter
1/2 c. sugar
1/2 c. brown sugar
1 egg
1 tsp. vanilla
1 1/2 c. flour
4 c. Rice Krispies

Mix first 6 ingredients. Add flour and Rice Krispies. Shape into balls. Place on cookie sheet. Bake at 350 degrees for 12 minutes.