School Lunch Peanut Butter Bars

1 cup sugar
1 cup brown sugar, firmly packed
1 cup butter
1 teaspoon vanilla
2 large eggs
1 cup peanut butter, creamy
2 cups oatmeal, not quick (make sure they are certified GF)
2 cups flour
1 teaspoon baking soda
1 teaspoon salt

1. Preheat oven to 350. Grease sheet cake pan.
2. Cream first three ingredients. Add the vanilla, eggs, and peanut butter and combine. Add the remaining ingredients and mix together.
3. Spread batter in cake pan. Cook for 15 minutes.
4. While hot, spread 1 1/2 cups creamy peanut butter on the top.
5. After peanut butter cools and becomes solid again, spread chocolate frosting on top and cut into bars.