1 (6 oz.) pkg. semi-sweet chocolate chips
1 (6 oz.) pkg. butterscotch chips
1/2 c. butter
1/2 c. peanut butter
1 tsp. vanilla
1 pkg. tiny marshmallows

Butter a 9 x 13 inch cake pan. Line bottom of cake pan with marshmallows, 1 layer deep only. Melt all other ingredients in a double boiler or in microwave. Pour over marshmallows. Cool completely. Cut into bars. Store in refrigerator. Make only one batch at a time.