Brownies:
Melt 1 stick butter and 1/2c. peanut butter in the microwave.
Cool a little and stir in 3 eggs, 1 tsp vanilla.
Add 1c. flour, 1 1/2c. sugar, 1 tsp. baking powder.
Mix well and pour into a 8x8 pan lined with nonstick foil.
Bake at 350 for 35-40 minutes. Cool completely and frost!
Frosting:
Beat peanut butter, 1/2 tsp. vanilla and 2c. powdered sugar.
SLOWLY add milk until the desired consistency to spread on. I made my thin for spreading.
Top brownies with caramel sauce, if desired.