1/2 c. sugar
1/2 c. brown sugar
1/2 c. butter
1/2 c. peanut butter
1 egg
1 tsp. vanilla
1 1/2 c. flour
2 c. miniature marshmallows
1 (6 oz.) pkg. chocolate chips or M & M's

Blend all ingredients well except the marshmallows and chocolate chips. Press dough into a 9"x13" pan and bake at 375 degrees for 10 minutes. Sprinkle marshmallows and chips over the top. Bake 5 to 8 minutes more.