Mix
1 Cup melted butter
1 1/2 Cups brown sugar
1 1/2 Cups peanut butter
1 1/2 Cups sugar
3 eggs
1 TBS vanilla
Add:
1 1/2 tsp soda
3 Cups flour
3/4 tsp salt
1 1/2 Cups oats
Spread in 1/2 sheet pan. Bake for 20 minutes. While warm, spread with 2 cups of peanut butter mixed with 1/4 cup butter. Cool and frost with chocolate frosting