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A stack of homemade Chocolate Peanut Butter Oatmeal Bars with a rich, melted chocolate topping on a white plate.
Isabella

Hearty Chocolate Peanut Butter Oatmeal Bars

These no-bake bars feature a dense, chewy oatmeal and peanut butter base, crowned with a thick, glossy layer of melted chocolate. They are a simple, foolproof solution for sweet cravings, created on the stovetop and chilled to perfection for the ultimate texture contrast.
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Prep Time 20 minutes
Cook Time 10 minutes
Total Time 30 minutes
Servings: 24
Course: Breakfast, Dessert, Snack
Cuisine: American
Calories: 220
Ingredients Equipment Method Notes

Ingredients
  

  • 1 cup unsalted butter 2 sticks
  • 2 cups granulated sugar
  • 1/2 cup milk whole or 2%
  • 1 cup creamy peanut butter
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon salt
  • 3 cups old-fashioned rolled oats
  • 1 1/2 cups semi-sweet chocolate chips
  • 1 teaspoon vegetable oil or coconut oil

Equipment

  • 9x13 inch baking pan
  • parchment paper
  • medium saucepan
  • Spatula
  • Timer
  • Microwave-safe bowl
  • Offset spatula or spoon
  • Cutting board

Method
 

  1. Line a 9x13 inch baking pan with parchment paper, leaving an overhang on the long sides to act as handles. Set aside.
  2. In a medium saucepan, combine the unsalted butter, granulated sugar, and milk over medium heat. Stir until the butter melts and sugar dissolves.
  3. Bring the mixture to a full, rolling boil. Set a timer and boil for exactly one minute, stirring continuously.
  4. Immediately remove the pan from the heat. Stir in the creamy peanut butter, vanilla extract, and salt until completely smooth.
  5. Add the old-fashioned rolled oats and stir with a spatula until every oat is fully coated.
  6. Quickly pour the oatmeal mixture into the prepared pan. Press down firmly and evenly to create a compact base.
  7. In a microwave-safe bowl, combine the chocolate chips and oil. Microwave in 30-second intervals, stirring between each, until smooth.
  8. Pour the melted chocolate over the oatmeal base and spread into an even layer.
  9. Refrigerate for at least 2-3 hours, or until the chocolate is completely firm.
  10. Use the parchment handles to lift the bars out of the pan. Place on a cutting board and slice into squares to serve.

Notes

Store bars in an airtight container in the refrigerator for up to one week. For best results, use standard commercial creamy peanut butter (not natural) and old-fashioned rolled oats (not quick-cook). For a gluten-free version, use certified gluten-free oats. For a creative twist, add a sprinkle of flaky sea salt on top of the chocolate before chilling.