Frosted Peanut Butter Brownies

I love recipes that are big enough to fit in a cookie sheet, and this one does just that. Yummy, and makes enough for a crowd? It's a winner!

Frosted Peanut Butter Brownies

1¼ cup rolled oats (quick or regular)
1 cup sugar
1 cup brown sugar
1 cup softened butter
2 eggs
2 cups flour
1 cup peanut butter
1 tsp. baking soda
½ tsp. salt
Frosting:
4 cups powdered sugar
1 tsp. vanilla
3 TBSP. peanut butter
1 TBSP. oil
Hot water to desired consistency

Preheat oven to 350* F. Mix all brownie ingredients in a large bowl. Batter will be thick. Spread evenly onto a greased 17×11 cookie sheet with your hands. Bake @ 350* F for 15-20 min. until light golden brown. Cool completely, then frost.
For frosting- Mix sugar, vanilla, peanut butter and oil together. Add hot water until desired consistency. Pour over brownies and frost evenly. Cut into 48 squares.