Skip to Content

Peanut Butter Oatmeal Bars with Chocolate Frosting

These peanut butter oatmeal bars have a thick and crunchy peanut buttery base that is topped with delicious chocolate frosting. Two of my favorite flavors in one tasty dessert.

Peanut butter oatmeal bars with chocolate frosting.

We love the combination of peanut butter and chocolate in our house.  I made a batch of a peanut butter chocolate layer bars the other day and they were gone in a flash.

Printable Recipe – Peanut Butter Oatmeal Bars.

It is a foregone conclusion that anything made of peanut butter and chocolate will be a hit with me.   This recipe also calls for oatmeal, so that I can at least trick myself into thinking that I am eating in a slightly healthy way!

These yummy and decadent Peanut butter oatmeal bars are sort of a cross between no baked bars and brownies. 

The peanut butter makes a rich and thick batter, but they are cooked the way you do a traditional brownie. Add a thin layer of peanut butter and chocolate frosting and you have a great sweet treat.

 Peanut butter oatmeal barsThe recipe makes 3 dozen delicious treats. Try one today!

For more great desserts, please visit The Gardening Cook on Facebook.


Yield: 2

Peanut butter Oatmeal Bars with Chocolate Frosting

Peanut butter Oatmeal Bars with Chocolate Frosting

Enjoy these peanut butter oatmeal bars as a snack or dessert to get your Reese;s peanut butter fix.

Prep Time 20 minutes
Total Time 20 minutes


  • 1-3/4 cups reduced-fat peanut butter
  • 1/3 cup butter, softened
  • 1 cup packed brown sugar
  • 3/4 cup sugar
  • 2 eggs
  • 1/2 cup unsweetened applesauce
  • 1 teaspoon pure vanilla extract
  • 2 cups all-purpose flour
  • 2 cups quick-cooking oats
  • 1 teaspoon baking soda
  • 3/4 cups reduced fat peanut butter

For the Frosting:

  • 4-1/2 cups confectioners' sugar
  • 1/3 cup skim milk
  • 1/4 cup baking cocoa
  • 1/4 cup butter, softened
  • 1 teaspoon pure vanilla extract
  • 1/2 teaspoon Kosher salt


  1. In a large bowl, cream together 1 3/4 cup of peanut butter, softened butter, brown sugar and white sugar until light and fluffy.
  2. Add the eggs, one at a time, beating well after each addition. Beat in the applesauce and vanilla.
  3. In a separate bowl, combine the flour, oats and baking soda; gradually add to creamed mixture and mix well (batter will be very thick and sticky).
  4. Spread into a 15-in. x 10-in. x 1-in. baking pan coated with cooking spray.
  5. Bake at 350° for 18-22 minutes or until lightly browned.
  6. Cool on a wire rack for 10 minutes; spread with additional 3/4 cup of peanut butter. Cool to room temperature, then refrigerate for 30 minutes.

To make the frosting

  1. In a large bowl, beat frosting ingredients until light and fluffy.
  2. Spread over the peanut butter layer. Cut into bars. Yields: 3 dozen.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 271Total Fat: 10gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 18mgSodium: 203mgCarbohydrates: 39gFiber: 2gSugar: 25gProtein: 7g

Nutritional information is approximate due to natural variation in ingredients and the cook-at-home nature of our meals.

Share on Social Media

Disclosure of Material Connection: Some of the links in the post above are "affiliate links." This means if you click on the link and purchase the item, I will receive a small commission from the sale, but the price is the same for you. I am disclosing this in accordance with the Federal Trade Commission's 16 CFR, Part 255: "Guides Concerning the Use of Endorsements and Testimonials in Advertising."

Skip to Recipe