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Soft peanut butter bars covered with chocolate frosting— they’re incredibly indulgent!

Peanut Butter Blondies with Chocolate Buttercream

Print Recipe
Soft peanut butter bars covered with chocolate frosting— they’re incredibly indulgent!
Course Dessert
Cuisine American
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Servings 24 bars
Calories 318
Author Annalise

Ingredients

Peanut Butter Blondies:

  • 10 tablespoons unsalted butter (166 grams)
  • 2 cups light or dark brown sugar (425 grams)
  • 1 cup peanut butter (270 grams), smooth or crunchy
  • 2 large eggs
  • 2 teaspoons vanilla extract
  • 1/2 teaspoon salt
  • 2 cups all-purpose flour (240 grams)
  • 1 teaspoon baking powder

Chocolate Buttercream:

  • 6 tablespoons unsalted butter (85 grams), softened to room temperature
  • 1/4 teaspoon salt
  • 2 cups powdered sugar (227 grams), sifted
  • 3-4 tablespoons milk
  • 3/4 cup semi-sweet or bittersweet chocolate chips (128 grams), melted

Instructions

To make the blondies:

  • Preheat oven to 325°F. Line a 9x13 inch baking pan with parchment paper or grease with nonstick baking spray.
  • Melt the butter and sugar together in a medium saucepan over medium heat. Once melted, remove from heat and allow to cool for 5 minutes. Stir in the peanut butter until combined. Add the eggs one at a time, and then the vanilla, stirring until combined.
  • In a separate bowl, combine the flour, baking powder, and salt. Add to the wet ingredients and stir until combined. Spread the batter into the prepared baking sheet. Bake for 30-40 minutes, until a toothpick inserted into the center comes out mostly clean.
  • Let cool completely before frosting.

To make the buttercream:

  • Combine all ingredients in the bowl of a stand mixer fitted with a paddle attachment. Beat on medium speed until smooth, scraping down the mixer bowl a few times as needed.
  • Frost blondies with buttercream. Slice into squares and serve.

Notes

NOTES:
  • To melt chocolate, microwave chocolate in a heat-proof bowl on high in 30 second intervals. Stirring until smooth.

Nutrition

Calories: 318kcal | Carbohydrates: 41g | Protein: 5g | Fat: 16g | Saturated Fat: 7g | Cholesterol: 38mg | Sodium: 137mg | Potassium: 163mg | Fiber: 1g | Sugar: 31g | Vitamin A: 265IU | Calcium: 39mg | Iron: 1mg