3/4 c. butter, melted
3/4 c. brown sugar, packed
4 c. quick Quaker oats
3/4 c. creamy or chunky peanut butter
1 pkg. (12 oz.) chocolate chips

Mix butter, brown sugar and oats together. pat into bottom of 9 x 13 pan. Bake 15 minutes at 350 degrees. While still warm, spread peanut butter over baked mixture. Melt chocolate chips in double boiler or microwave (30 seconds stir, 30 seconds stir until melted). Spread over peanut butter. Cool in refrigerator. Cut in squares.