These peanut butter blondies are soft, chewy and topped with Reese’s Pieces for a little crunch! This blondie dessert is perfect for peanut butter lovers.

Peanut butter blondies with Reese's pieces stacked on a plate.

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Peanut Butter Blondies Recipe

Peanut butter blondies combine the rich and creamy flavor of peanut butter with the sweet and dense texture of traditional blondies! Loaded with peanut butter flavor and studded with Reese’s pieces these chewy treats are a favorite for peanut butter lovers!

This blondie dessert tastes like a mix between a classic blondie, M&M cookie bar and peanut butter bar. It’s got a great ratio of peanut butter and chocolate flavor and is the perfect texture with a soft middle and crisp edges. You’ll need a large glass of milk with these tasty bars. Perfection!

Peanut butter blondie dough with peanut butter chips and Reese's pieces.

Best Type of Peanut Butter to Use

When making this recipe, it’s important to use creamy peanut butter, such as Jif or Skippy. A natural, drippy variety will not give you the same soft texture as the creamy type.

Baking Tips

  • Line your baking dish with foil for easy removal.
  • Make sure to accurately measure the flour with the spoon and level technique.
  • Place extra Reese’s pieces on top prior to baking. This makes them look extra pretty.
  • Don’t overbake! They may look a little soft, but they’ll harden as they cool.
  • Use a toothpick to make sure the center of your peanut butter blondies comes out clean.
A stack of peanut butter blondies.

Variations

This recipe is super versatile, so feel free to make it your own.

  • Swap Reese’s pieces for M&M’s, or use white or semi sweet chocolate chips in place of peanut butter chips.
  • Chopped Reese’s cups are also an easy substitute for Reese’s pieces.
  • Leave out the mix-in’s all together if you prefer. These peanut butter blondies are plenty chewy and delicious all on their own!

Storing and Freezing Peanut Butter Blondies

  • Store: Store at room temperature in an airtight container for up to 3 days.
  • Freeze: Peanut butter blondies freeze very well. To freeze, simply wrap in foil and place in an airtight container or freezer bag. They will keep in the freezer for up to 3 months. When ready to enjoy, let thaw on the counter about an hour beforehand.
Peanut butter blondies on a plate.

Other favorite peanut butter desserts are peanut butter lunch lady bars, peanut butter cookies, peanut butter blossoms and peanut butter brownies!

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stacked peanut butter blondies on plate

Peanut Butter Blondies

5 from 6 votes
Recipe by: Jamielyn Nye
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 9
These peanut butter blondies are soft, chewy and topped with Reese's Pieces for a little crunch! This blondie dessert is perfect for peanut butter lovers.
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Ingredients 

  • ½ cup (1 stick) butter , slightly melted
  • 1 cup light brown sugar , packed
  • 1 large egg , whisked
  • 1 teaspoon vanilla extract
  • ½ cup creamy peanut butter , I prefer Jif's or Skippy for this recipe
  • 1 cup all-purpose flour , divided
  • 1 teaspoons baking powder
  • ½ teaspoon Kosher salt
  • ½ cup Reese's Pieces , or chopped reese's
  • ½ cup peanut butter chips , or chocolate chips

Instructions

  • Preheat oven to 350°F and grease a 9×9" pan. Lightly dust with flour or line with parchment paper or foil. Gather ingredients.
  • Whisk 1/2 cup butter and 1 cup brown sugar in a large bowl or use a handheld mixer. Add in 1 egg and 1 teaspoon vanilla and stir until combined. Then add in the 1/2 cup creamy peanut butter and mix until combined.
  • Mix in 1 cup flour, 1 teaspoon baking powder and 1/2 teaspoon salt. Fold in 1/2 cup Reese's Pieces and 1/2 cup peanut butter chips and mix just until combined.
  • Press the dough into the pan (flour your hands if you need to). Press extra Reese's Pieces and peanut butter chips on top if you’d like. 
  • Bake for 18-23 minutes or until a toothpick comes clean. The dough should be soft in the center and the edges lightly golden.
  • Allow bars to cool and then slice into 9 bars.

Last step: Please leave a comment and rating after you make the recipe.

Notes

Variation: Alternatively you could use peanut butter M&M’s instead or chopped up Reese’s peanut butter cups. 
Storage: Store in an airtight container for up to 3 days. Place in the freezer for up to 3 months. Allow to thaw on the counter an hour before serving. 

Nutrition

Calories: 349kcal, Carbohydrates: 46g, Protein: 5g, Fat: 17g, Saturated Fat: 11g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 3g, Trans Fat: 1g, Cholesterol: 48mg, Sodium: 277mg, Potassium: 140mg, Fiber: 1g, Sugar: 33g, Vitamin A: 355IU, Calcium: 55mg, Iron: 1mg

Nutrition provided is an estimate. It will vary based on specific ingredients used.

peanut butter blondies
This version has chopped Reese’s peanut butter cups and chopped peanut butter M&M’s.