Cream butter, sugar and brown sugar. Mix in egg, peanut butter, soda, salt and vanilla. Stir in flour and oatmeal. Spread in greased 9x13 inch pan and bake for 20 minutes. Sprinkle with chocolate chips. Let stand for 5 minutes. Combine powdered sugar, peanut butter and evaporated milk. Mix well. Spread melted chocolate chip mixture and drizzle with peanut butter mix.
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