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a slice of peanut butter blondie with peanut butter candies on top
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5 from 14 votes

Peanut Butter Blondies with Peanut Butter Frosting

These Peanut Butter Blondies with Peanut Butter Frosting are the ultimate treat for the serious peanut butter lovers in your life!  If you leave them unfrosted, these are baked goods that ship well and are perfect to include in a care package for someone special!  
Prep Time10 mins
Cook Time25 mins
Total Time35 mins
Course: Dessert
Cuisine: American
Servings: 9 servings
Calories: 669kcal
Author: Amy Nash

Ingredients

Peanut Butter Blondies

  • ½ cup creamy peanut butter
  • ½ cup butter melted
  • ¾ cup brown sugar
  • 1 large egg
  • 1 large egg yolk
  • 1 teaspoon vanilla
  • 1 cup all-purpose flour
  • ¼ teaspoon salt

Peanut Butter Frosting

  • 1 cup creamy peanut butter
  • ½ cup butter softened
  • ½ teaspoon vanilla
  • 2 Tablespoons heavy cream
  • 1 cup powdered sugar
  • ½ cup Reese's Pieces

Instructions

  • Heat oven to 350 degrees. Line a square baking dish with a parchment paper sling.
  • In a large bowl, whisk the peanut butter and butter together until smooth and creamy. Add the brown sugar, egg and extra egg yolk, and vanilla and mix well to combine.
  • Stir in the flour and salt with a spoon, then spread into the prepared baking dish, pushing towards the edges of the pan as needed. Sprinkle with Reese's Pieces, if not planning to frost.
  • Bake for 22-27 minutes until done, then remove from oven and cool completely. Do not overbake.
  • Prepare the frosting by beating the peanut butter and butter together until smooth and creamy. Add the vanilla, cream and powdered sugar and beat well, then frost the peanut butter blondies in the pan and sprinkle with Reese's Pieces. Cut into 9 squares and serve.

Notes

This recipe can easily be prepared to be gluten-free using Bob's Red Mill Gluten-Free 1 to 1 Baking Flour.

Nutrition

Serving: 1g | Calories: 669kcal | Carbohydrates: 55g | Protein: 13g | Fat: 47g | Saturated Fat: 20g | Polyunsaturated Fat: 22g | Trans Fat: 1g | Cholesterol: 99mg | Sodium: 460mg | Fiber: 3g | Sugar: 35g