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+ servings
Four peanut butter bars on a wire cooling rack.

Peanut Butter Bars with Chocolate Frosting

If you love peanut butter and chocolate, these are a must make!
Course Dessert
Cuisine American
Keyword peanut butter
Prep Time 10 minutes
Cook Time 35 minutes
Total Time 45 minutes
Servings 8 bars
Calories 469kcal


Peanut Butter Bars:

  • 6 tablespoons butter softened
  • 1/2 cup peanut butter
  • 1 cup granulated sugar
  • 1/4 cup light brown sugar packed
  • 2 largee eggs
  • 1 teaspoon vanilla
  • 1 cup flour
  • 1/4 teaspoon kosher salt
  • 1 teaspoon baking powder

For the chocolate frosting:

  • 1/2 cup white sugar
  • 3 tablespoons butter
  • 3 tablespoons milk
  • 1/4 cup chocolate chips milk chocolate or semi-sweet


For the Peanut Butter Bars:

  • Preheat oven to 350 degrees and line a 9x9 baking dish with parchment paper.
  • Cream the butter and peanut butter together. Add in the sugar and beat until well combined. Add the eggs, one at a time, mixing well after each addition. Stir in the vanilla.
  • In a small bowl, whisk together the flour, salt, and baking powder. Mix in to the peanut butter mixture until well combined.
  • Spread into the prepared baking dish.
  • Bake for 30 minutes or until a toothpick inserted near the center comes out clean. Cool completely before frosting.

For the chocolate frosting:

  • Add sugar, butter, and milk to a small saucepan over medium heat and bring to a boil. Boil for exactly 60 seconds and remove from heat. Stir in chocolate chips and continue stirring until the chocolate has melted.
  • Immediately pour over the peanut butter bars. Allow to cool for 30 minutes before cutting.


Serving: 1bar | Calories: 469kcal | Carbohydrates: 63g | Protein: 6g | Fat: 22g | Saturated Fat: 10g | Cholesterol: 36mg | Sodium: 268mg | Potassium: 188mg | Fiber: 1g | Sugar: 49g | Vitamin A: 415IU | Calcium: 53mg | Iron: 1.2mg