1/2 c. butter
1/2 c. sugar
1/2 c. brown sugar
1 egg
1/3 c. peanut butter
1/2 tsp. baking soda
1/4 tsp. salt
1/2 tsp. vanilla
1 c. flour
1 c. oats
1 (6 oz.) pkg. chocolate pieces

Cream butter, sugars, egg, and peanut butter. Stir in soda, salt, flavoring, flour, and oats. Spread in greased and floured 9 x 13 inch pan. Bake at 350 degrees for 20 to 25 minutes. Sprinkle chocolate pieces over hot cake and let set for 5 minutes. Spread over cake. Spread frosting over chocolate.

FROSTING:

1/2 c. powdered sugar
1/4 c. peanut butter
2 to 4 tbsp. milk

Combine all ingredients and beat until smooth. Spread over chocolate. Cut into bars after it has cooled.