Reese’s pieces peanut butter blondies are chewy, buttery, and full of peanut butter and chocolate goodness. Every bite combines creamy peanut butter with semi-sweet chocolate chips and colorful Reese’s Pieces for a crowd-pleasing treat.
Why are peanut butter desserts so irresistible? The nutty richness, silky mouthfeel, and the combination of sweet and salty flavors make them hard to resist. These blondies build on that appeal by folding peanut butter into the batter and adding chocolate chips and Reese’s Pieces for texture and bright color—perfect for fall and Halloween gatherings.
How to make Reese’s pieces peanut butter blondies
- Preheat the oven to 350°F. Line an 8-inch square baking pan with parchment paper and spray the paper lightly with nonstick spray.
- Whisk together the dry ingredients: flour, cornstarch, baking soda, and salt.
- In a mixing bowl, combine the melted butter and creamy peanut butter until smooth. Add the granulated and brown sugars and whisk to combine, then mix in the egg and vanilla until incorporated.
- With the mixer on low, slowly add the dry ingredients and mix until just combined; do not overmix.
- Fold in the semi-sweet chocolate chips and most of the Reese’s Pieces (reserve some to sprinkle on top). Transfer the dough to the prepared pan and press it firmly and evenly into the pan.
- Bake the blondies at 350°F for 20 minutes. Allow them to cool in the pan for about 10 minutes, then transfer to a wire rack to cool completely before slicing.
Crumbly dough? A slightly crumbly dough is fine—when pressed into the pan it will come together and set while baking.
Recipe FAQ
Use a creamy, no-stir peanut butter for the best texture. Natural peanut butter that separates in the jar tends to be too oily and can change the batter consistency. Crunchy peanut butter has not been tested in this recipe.
Yes. Any similarly sized chocolate candy will work—M&M’s or other candy pieces can be substituted for Reese’s Pieces.
Yes. Once fully cooled, wrap the blondies tightly in plastic wrap and aluminum foil and freeze for up to one month. Thaw in the refrigerator before bringing them to room temperature to serve.
Related Recipes
If you enjoy blondies, try a classic blondie with white chocolate, semisweet chips, and pecans, or branch out to pecan coconut blondies or Nutella-stuffed blondies for a twist. For Halloween dessert ideas, candy bark or themed peanut butter cookies topped with Reese’s minis make great options.
These Reese’s Pieces peanut butter blondies are ideal for fall gatherings, school parties, or a Halloween dessert table. If you try the recipe, leave a review and share how you served them.
Get the Recipe: Reese’s Pieces Peanut Butter Blondies
Ingredients
- 6 Tablespoons (85 g) unsalted butter, melted
- 1/2 cup (130 g) creamy peanut butter
- 1/4 cup (50 g) granulated sugar
- 3/4 cup (150 g) packed brown sugar
- 1 teaspoon vanilla extract
- 1 large egg
- 2 cups (250 g) all-purpose flour
- 1 teaspoon baking soda
- 1 Tablespoon cornstarch
- 1/2 teaspoon salt
- 1/2 cup (87 g) semi-sweet chocolate chips
- 1 cup (200 g) Reese’s Pieces, divided
Instructions
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Preheat oven to 350° F. Line an 8″ square pan with parchment and spray with nonstick spray.
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Whisk together the flour, baking soda, cornstarch, and salt in a medium bowl; set aside.
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In a stand mixer or with a hand mixer, blend the melted butter and peanut butter until smooth. Add granulated and brown sugars and whisk until combined. Switch to the paddle, add vanilla and the egg, and mix until incorporated, about 2 minutes.
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On low speed, add the dry ingredients slowly. Fold in the chocolate chips and 3/4 cup of the Reese’s Pieces with a spatula. The dough will be soft and slightly crumbly—this is normal.
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Press the dough evenly into the prepared pan. Sprinkle the remaining Reese’s Pieces over the top and gently press them in.
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Bake for 20 minutes. Let cool in the pan for 10 minutes, then transfer to a rack to cool completely before cutting into squares.
Notes
Inspired by Crunchy, Creamy, Sweet.