Preheat the oven to 350

Grease a9 by 13-inch pan

Cream the butter and sugar and brown sugar together

Blend in the NBA in egg the peanut butter in the salt baking soda in the vanilla

Stir in 1 cup flour and the rolled oats

Spread in the greased pan and bake for 25 minutes

Remove from oven and sprinkle with chocolate chips then let melt spread and cool

In a separate bowl mix the peanut butter and the evaporated milk or regular milk and the powdered sugar spread the icing over the peanut butter bars