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chocolate peanut butter oatmeal bars cut into squares and lined up together on a brown plate.
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5 from 3 votes

Chocolate Peanut Butter Oatmeal Bars

These chocolate peanut butter oatmeal bars are a peanut butter oatmeal cookie topped with a thick layer of chocolate and peanut butter swirl.
Prep Time20 minutes
Cook Time35 minutes
Cooling Time30 minutes
Total Time1 hour 25 minutes
Course: Anytime, Dessert
Cuisine: American
Servings: 12
Calories: 573kcal
Author: Britney

Equipment

  • 9x13 Baking Pan
  • Microwave Safe Bowl
  • Mixing Bowls
  • Stand Mixer or Electric Mixer

Ingredients

  • 1 cup Salted Butter (room temperature)
  • 1 cup Brown Sugar
  • ¾ cup Sugar
  • ¾ cup Creamy Peanut Butter
  • 2 tsp Vanilla Extract
  • 2 Large Eggs
  • 2 cups All-Purpose Flour
  • 2 cups Old Fashioned Oats
  • 2 tsp Baking Soda
  • 1 tsp Kosher Salt

Chocolate Peanut Butter Layer

  • 2 cups Dark Chocolate Chips (melted)
  • ½ cups Creamy Peanut Butter (melted)

Instructions

  • Preheat the oven to 350 degrees F. Line a 9x13 baking pan with parchment paper.
  • Mix together the dry ingredients in a large mixing bowl - flour, old-fashioned oats, baking soda, salt, In the bowl of a stand mixer fitted with the paddle attachment, combine room temperature salted butter, brown sugar, and sugar.
  • Mix on medium speed for 3 minutes, until fluffy and lighter in color. Then add creamy peanut butter and vanilla extract and continue to mix until combined. Add eggs one at a time. Scrape down the sides of the bowl as needed. Add the oatmeal mixture to the stand mixer and mix until just combined. Batter should be thick.
  • Add batter to the baking pan and mash to make flatten to make an even layer. Bake peanut butter oatmeal bars for 30-35 minutes, until the center is set. Allow the bars to cool completely.
  • Make the chocolate layer. Melt chocolate chips in the microwave in a microwave-safe bowl for 30 seconds and then in 15 second increments until the chocolate is fully melted.
  • In a separate bowl, melt remaining peanut butter. Once the baked bars have cooled completely, pour melted chocolate on top of the bars. Drizzle the melted peanut butter on top and use a toothpick to swirl the peanut butter through the chocolate. Refrigerate or 30 minutes.
  • Add flaky salt on top (optional).

Notes

Tips
  • For easy cutting, run a sharp knife under hot water for about 30 seconds. Wipe off the water and press the knife into the bars and remove the blade in one motion for a nice clean cut.
  • Be sure to wait until the bars have cooled completely before adding the chocolate peanut butter mixture on top.
  • Don't skip the parchment paper! It's SO much easier to get the bars out of the pan by using parchment paper.

Nutrition

Calories: 573kcal | Carbohydrates: 63g | Protein: 11g | Fat: 32g | Saturated Fat: 17g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 9g | Trans Fat: 0.5g | Cholesterol: 58mg | Sodium: 531mg | Potassium: 363mg | Fiber: 3g | Sugar: 35g | Vitamin A: 417IU | Vitamin C: 0.1mg | Calcium: 111mg | Iron: 2mg