Peanut Butter Blondies with Reese’s Pieces Recipe
Introduction
Peanut Butter Blondies are a rich, chewy treat that combines the nutty flavor of peanut butter with the sweet crunch of Reese’s Pieces. These bars are perfect for satisfying a sweet tooth and are easy to make with simple ingredients.

Ingredients
- 3/4 cup (170g) unsalted butter, melted and slightly cooled
- 2 cups (400g) packed light or dark brown sugar
- 3/4 cup (190g) creamy peanut butter
- 2 large eggs + 1 extra egg yolk
- 1 Tablespoon pure vanilla extract
- 2 cups (250g) all-purpose flour (spooned & leveled)
- 1 teaspoon baking powder
- 1 teaspoon salt
- 1 and 1/4 cups (about 260g) Reese’s Pieces
Instructions
- Step 1: Preheat the oven to 350°F (177°C) and position the oven rack in the center. Line a 9×13-inch baking pan with parchment paper, covering the bottom and sides with an overhang for easy removal. Set aside.
- Step 2: In a large bowl, whisk together the melted butter and brown sugar until combined. Add the peanut butter and continue whisking. Then mix in the eggs, extra yolk, and vanilla extract until smooth.
- Step 3: Add the flour, baking powder, and salt to the wet mixture. Fold gently with a rubber spatula until just combined—the batter will be thick. Fold in the Reese’s Pieces, saving a few to sprinkle on top if you like.
- Step 4: Spread the batter evenly into the prepared pan and sprinkle with the reserved Reese’s Pieces. Bake for about 30 minutes. Test doneness by inserting a toothpick in the center; it should come out with a few moist crumbs but no wet batter. Check every 2 minutes after 30 minutes to avoid overbaking.
- Step 5: Let the blondies cool completely in the pan on a wire rack. Use the parchment paper overhang to lift them out and cut into squares.
Tips & Variations
- For a chunkier texture, try using crunchy peanut butter instead of creamy.
- Swap Reese’s Pieces for chocolate chips or chopped peanuts for a different twist.
- If you prefer chewier blondies, slightly underbake and let them set as they cool.
Storage
Store leftover blondies covered at room temperature for up to 1 week. They keep their texture best this way. For longer storage, you can freeze the bars in an airtight container for up to 3 months; thaw at room temperature before serving.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use natural peanut butter instead of creamy peanut butter?
Yes, but natural peanut butter may make the batter less smooth and slightly alter the texture. Stir it well before measuring to ensure even consistency.
Do I need to line the baking pan with parchment paper?
While not absolutely required, lining the pan makes removing the blondies much easier and helps prevent sticking. It also simplifies cleanup.
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Peanut Butter Blondies with Reese’s Pieces Recipe
- Total Time: 45-49 minutes
- Yield: 16 blondie squares 1x
Description
These Peanut Butter Blondies combine rich peanut butter flavor with chewy brown sugar sweetness and a delightful crunch from Reese’s Pieces. Baked to perfection in a 9×13-inch pan, these bars are easy to make and perfect for parties, snacks, or anytime you crave a buttery, peanut buttery treat.
Ingredients
Wet Ingredients
- 3/4 cup (170g) unsalted butter, melted and slightly cooled
- 2 cups (400g) packed light or dark brown sugar
- 3/4 cup (190g) creamy peanut butter
- 2 large eggs + 1 extra egg yolk
- 1 Tablespoon pure vanilla extract
Dry Ingredients
- 2 cups (250g) all-purpose flour (spooned & leveled)
- 1 teaspoon baking powder
- 1 teaspoon salt
Mix-Ins
- 1 and 1/4 cups (about 260g) Reese’s Pieces
Instructions
- Preheat and Prepare Pan: Preheat your oven to 350°F (177°C) and position the oven rack in the center. Line a 9×13-inch baking pan with parchment paper, making sure to leave overhangs on the sides for easy removal later. Set aside.
- Mix Wet Ingredients: In a large bowl, whisk together the melted butter and brown sugar until just combined. Next, whisk in the creamy peanut butter until smooth. Add the two eggs, the extra egg yolk, and the vanilla extract, then continue whisking until the mixture is fully blended.
- Add Dry Ingredients and Fold: Add the flour, baking powder, and salt to the wet mixture. Using a rubber spatula, fold the batter together carefully—it will be very thick. Finally, fold in the Reese’s Pieces evenly throughout the batter. Spread the batter evenly in your prepared pan and optionally sprinkle a few extra Reese’s Pieces on top for a decorative finish.
- Bake: Place the pan in the preheated oven and bake for 30 minutes. Check doneness by inserting a toothpick in the center; it should come out with a few moist crumbs but no wet batter. If wet batter remains, continue baking and check every 2 minutes to avoid over-baking, which can dry out the blondies.
- Cool and Slice: Remove the pan from the oven and set it on a wire rack to cool completely. Once cooled, use the parchment paper overhang to lift the blondies from the pan. Cut them into squares of your preferred size.
- Store: Store any leftover blondies in an airtight container at room temperature for up to 1 week to keep them fresh.
Notes
- Ensure the melted butter is slightly cooled before whisking with eggs to prevent scrambling.
- Do not over-bake to keep the blondies moist and chewy.
- Parchment paper overhang makes removing the bars easy and prevents sticking.
- You can substitute Reese’s Pieces with chocolate chips or peanut M&Ms for variation.
- For a gluten-free version, substitute all-purpose flour with a gluten-free flour blend.
- Prep Time: 15 minutes
- Cook Time: 30-34 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Keywords: peanut butter blondies, peanut butter dessert, blondie bars, Reese’s Pieces dessert, easy blondie recipe, bake from scratch blondies

