School Lunch Peanut Butter Bars

1-1/2 c flour
1-1/4 tsp salt
1/2 tsp baking soda
3/4 c butter
3/4 c sugar
3/4 c brown suar
1-1/2 tsp vanilla
1-1/2 c creamy peanut butter (divided)
2 eggs
1-1/2 c quick oats

Frosting:
1/2 c butter
3-1/2 c powdered sugar
2 TBS cocoa
1/4 c milk
1 tsp vanilla

Preheat oven to 350 degrees.
In small bowl, mix flour, baking soda and salt.
In large bowl, cream butter, sugars, 3/4 c peanut butter, eggs and vanilla.
Gradually add dry ingredients, just until incorporated.
Stir in oats.
Spread onto 11x15 jelly roll pan (cookie sheet).
Bake 12-15 minutes or until golden brown. Cool 10 minutes.

Make frosting. Whip remaining 3/4 c peanut butter until it is lighter colored and fluffy. Spread whipped peanut butter over pan cookie.
In sauce pan, melt butter. Add milk and cocoa. Cook over medium heat, stirring constantly, until just boiling. Remove from heat and add vanilla.
Gradually add powdered sugar. Stir until thickened.
Pour over peanut butter and gently spread over cookie.

Cool completely, and slice into bar cookies.