These peanut butter bars are the exact recipe the lunch ladies once served in schools. They have a soft, chewy peanut butter cookie base, creamy peanut butter center and chocolate buttercream on top. These are the best peanut butter bars of all time!

I have tried a lot of peanut butter bars in my day, and these peanut butter bars are the best I have ever tried.

My favorite treat growing up was the peanut butter bars that the lunch ladies served in our elementary school. I would bring an extra 50 cents to school so I could buy one of these delicious peanut butter bars whenever possible.

These bars are made in a half sheet pan, and you can cut them into as many bars as you need.

Peanut Butter Bars


• 1 cup butter softened

• 1 cup sugar

• 1 cup brown sugar firmly packed

• 1 teaspoon vanilla extract

• 2 large eggs

• 3 cups peanut butter divided

• 2 cups old-fashioned oats

• 2 cups flour

• 1 teaspoon baking soda

• 1 teaspoon salt


• 2/3 cup butter softened

• 1/3 cup milk

• 2 1/2 teaspoons vanilla

• 5 tablespoons cocoa powder

• 4 cups powdered sugar


Preheat oven to 350 degrees.
In a large bowl, cream together butter, sugar and brown sugar. Add vanilla, eggs, and 1 cup of the peanut butter; stir to combine. Add oats, flour, baking soda and salt and mix until well combined.

Spray a baking sheet (half sheet jelly roll pan that is approximately 18 x 12 x 1 inch) with nonstick cooking spray and spread out dough in an even layer.
Bake for 15 minutes and remove from oven.

Drop remaining peanut butter (about 2 cups) by very small spoonfuls all over on top of warm bars. Let set for about 5-6 minutes and gently spread when peanut butter has begun to melt. It will spread easily when the peanut butter has softened on the warm bars. Don’t try to spread it while still thick.
Then let the bars cool until peanut butter has set up.

While cooling, mix together frosting ingredients with a hand mixer until smooth and spread on top of bars. Cut into bars and serve.

(1) comment


These look delicious. Can they be made ahead and frozen?

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