Chocolate-Frosted Peanut Butter Cookie Bars {Aka: School Lunch Peanut Butter Fingers}

INGREDIENTS

Cookie Base

1 cup

real butter (2 sticks) at room temperature

1 cup

granulated sugar

2 cups

brown sugar

1/2 cups peanut butter, chunky or smooth

eggs

2 tsp

vanilla

1 1/2 tsp

baking soda

1/2 tsp

table salt

3 cups

all purpose flour

3 cups

quick oats

optional: an extra 3/4 cup peanut butter, see notes in recipe below