Chocolate Peanut Butter Oatmeal Bars

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Hearty chocolate peanut butter oatmeal bars are topped with a layer of creamy peanut butter and a thick layer of decadent chocolate ganache. Decorate the top with a simple buckeye!

chocolate peanut butter bar with a bite out of it

Chocolate Peanut Butter Oatmeal Bars

I originally created this recipe for the Ohio Poultry Association. Find these Buckeye Oatmeal Bars and other Buckeye-inspired recipes here.

Once upon a time I threw healthy eating out the window like dirty dishwater and made these chocolate peanut butter oatmeal bars 4 times in one week.

Some weeks are like that right? I’m betting if you’re looking at this oatmeal bar recipe you’ve had that send-me-all-the-chocolate feeling before.

Everything in moderation, they say. Four pans of these chocolate peanut butter oatmeal bars might be a little over the top, but each bite is totally worth it.

For these chocolate peanut butter oatmeal bars, I started with my basic oatmeal bar recipe, then spread a thin layer of creamy peanut butter to the top.

I was challenged to create a Buckeye-inspired dessert (O-H-I-O!), so the logical next step was to spread a thick, rich layer of chocolate ganache on top of the peanut butter. Are you thinking that layer of chocolate looks to rich and thick? If you must, halve the ingredients for the ganache to make a thinner layer of chocolate topping. But I challenge you to use all that chocolate. Your teeth will sink into the creamy chocolate, then hit the thicker, chewier, peanut butter oatmeal bar. It’s the perfect pairing.

Like a thick, chocolate frosting calling your name.

A close up of a piece of peanut butter bar with a fork in it

I cut these bars into 9 squares, using 9 buckeye candies for topping. You can add more if you’d like your squares to be smaller, or you can leave the buckeyes off altogether. Trust me…the bars are good enough on their own.

But if you’re celebrating the Buckeyes at a football game this season? Add the buckeye candies and you’ll be the star of the show.


oatmeal bars with chocolate and buckeye on top
oatmeal bars with chocolate and buckeye on top

Chocolate Peanut Butter Oatmeal Bars

5 from 2 votes
Hearty chocolate peanut butter oatmeal bars are topped with a layer of creamy peanut butter and a thick layer of decadent chocolate ganache. Decorate the top with a simple buckeye!
Servings 9 servings
Prep Time 20 minutes
Cook Time 23 minutes
Total Time 43 minutes

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  • Preheat the oven to 350 degrees.
  • In the bowl for a stand mixer, cream together the butter and sugars.
  • Add the egg, peanut butter, salt and vanilla. Mix well.
  • Stir in the flour, baking soda and oats. Mix just until combined.
  • Spread in an 8x8 pan that has been sprayed with cooking spray.*
  • Bake at 350 degrees for 23-25 minutes.
  • Allow the bars to cool. After the bars have cooled to room temperature, spread ¾ cup creamy peanut butter overtop the oatmeal bars.


  • Pour 1 ½ cups water in the bottom pan of a double boiler and heat over medium-low heat.
  • Place the heavy whipping cream in the top pan of the double boiler.
  • Heat the heavy whipping cream until it is hot and steaming, but not boiling.
  • Remove the top portion of the double boiler from the heat and place it on a hot pad.
  • Add the chocolate chips.
  • Cover the pan with a plate and let it sit for 2 minutes.
  • Remove the plate and stir the chocolate for 1-2 minutes or until it is smooth and shiny.
  • Allow the ganache to sit for 3-5 minutes to cool just a bit.
  • Using a rubber spatula, spread the ganache overtop the peanut butter in a smooth layer.
  • Garnish the top with buckeyes while the chocolate is still wet if you desire the buckeyes to stick on the bars.
  • Cut into 9 bars and store in an airtight container.



*If you’d like to easily remove the bars from the baking pan to cut clean squares, first line the 8x8 pan with a piece parchment paper large enough to cover the bottom and hang over the sides of the pan about 1 inch. Then press the dough onto the parchment paper and bake as described. I like to remove the bars from the pan before I add the peanut butter and ganache toppings. This allows me to get the toppings all the way to the edges and cut the bars evenly.
**You can also make ganache in the microwave. Simply warm the heavy whipping cream in a microwave safe bowl, 20 seconds at a time, stirring between each interval, until the cream is hot but not boiling. Then add the chocolate chips and cover with a plate. Continue as described above.
***This amount of chocolate chips and cream makes a thick layer of ganache for the tops of the bars. If you’d like a thinner layer, simply use ¼ cup heavy cream and 1 cup of chocolate chips.
****The calories shown are based on the bars being cut into 9 pieces, with 1 serving being 1 bar. These bars are big and rich, so if you cut them smaller, they will be less calories! Since different brands of ingredients have different nutritional information, the calories shown are just an estimate.


Calories: 731kcal | Carbohydrates: 67g | Protein: 13g | Fat: 47g | Saturated Fat: 21g | Cholesterol: 68mg | Sodium: 378mg | Potassium: 508mg | Fiber: 6g | Sugar: 40g | Vitamin A: 560IU | Calcium: 69mg | Iron: 4.4mg
Course Dessert
Cuisine American
Calories 731
About JulieJulie Clark

About Julie Clark

I'm Julie Clark, CEO and recipe developer of Tastes of Lizzy T. With my B.A. in Education and over 30 years of cooking and baking, I want to teach YOU the best of our family recipes.

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Iga Dietmap
7 years ago

recipe like this should be illegal, definitely! 🙂

7 years ago

5 stars
Chocolate and peanut butter is my favorite! These sound perfect for me!

Alma Vorrei
7 years ago

5 stars
This is very delicious and one of my favourites! My aunt makes them often and had given me the recipe, but I didn’t have it on hand so I was happy to find it on here!