Name: Peanut Butter Blondies Recipe
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 2/3 cup unsalted butter (170 grams); 3/4 cup peanut butter (about 270 grams); 3 large eggs; 2 teaspoons vanilla extract; 2 cups all-purpose flour (250 grams); 2 cups light brown sugar (420 grams); 1/4 teaspoon salt; 3/4 cup Reese’s Pieces (about 140 grams); 3/4 cup chocolate chips (about 120 grams)

Jump to Recipe· 4.2 from 81 reviews

If you have a serious sweet tooth and a love for peanut butter, this Peanut Butter Blondies Recipe is about to become your new obsession. Imagine rich, buttery bars packed with creamy peanut butter, melted chocolate chips, and the delightful crunch of Reese’s Pieces—each bite offering a perfect balance of gooey and chewy textures. These blondies are incredibly easy to make, yet they bring a level of indulgence that feels like a special treat. Whether you’re baking for friends or just because, this recipe will fill your kitchen with irresistible aromas and leave everyone asking for seconds.

Ingredients You’ll Need

A close-up view of two stacked pieces of a thick cookie bar filled with melted dark chocolate chips. The cookie layers show a soft, slightly crumbly golden brown texture with scattered chocolate chunks inside. The top cookie has a smooth, slightly rough surface, and the bottom one supports it with visible bits of orange butterscotch chips mixed with the chocolate. The cookie bars rest on a white marbled surface with a few scattered chocolate pieces nearby. The image is bright and clean with a blurred light background. photo taken with an iphone --ar 4:5 --v 7

Simple, wholesome ingredients come together to create these irresistible Peanut Butter Blondies Recipe bars. Each component plays a crucial role, from the smooth peanut butter adding flavor and moisture, to the brown sugar giving a caramel-like richness and chewy texture.

Unsalted butter (2/3 cup / 170 grams): Provides a rich, creamy base and helps achieve that perfect moistness.
Peanut butter (3/4 cup / about 270 grams): Smooth peanut butter delivers intense flavor and creaminess.
Light brown sugar (2 cups / 420 grams): Infuses the blondies with sweetness and a hint of molasses for depth.
Vanilla extract (2 teaspoons): Elevates the overall flavor with its warm, aromatic notes.
Large eggs (3): Bind the ingredients together and add structure to the blondies.
All-purpose flour (2 cups / 250 grams): Creates the perfect tenderness and holds the blondies’ shape.
Salt (1/4 teaspoon): Balances the sweetness and enhances all the flavors.
Reese’s Pieces (3/4 cup / about 140 grams): Adds colorful bursts of peanut butter candy crunch.
Chocolate chips (3/4 cup / about 120 grams): Melts into luscious pockets of chocolate throughout.

How to Make Peanut Butter Blondies Recipe

Step 1: Prepare Your Baking Pan

Preheat your oven to 350 degrees Fahrenheit (180 degrees Celsius). Line a 9×13-inch baking pan with parchment paper, leaving an overhang, or lightly grease to prevent sticking. This setup is key for easy removal and clean slicing later on.

Step 2: Melt Butter and Peanut Butter Together

In a large microwave-safe bowl, melt the unsalted butter and peanut butter together in short bursts. Stir the mixture until smooth to create a rich and creamy base that’s bursting with peanut flavor.

Step 3: Incorporate Brown Sugar, Eggs, and Vanilla

Add the light brown sugar to the peanut butter mixture and whisk until well combined. Then whisk in the eggs and vanilla extract until the batter is smooth and no egg streaks remain—this ensures a velvety, uniform texture in your blondies.

Step 4: Fold in the Dry Ingredients

Gently fold in the all-purpose flour and salt, mixing just until you can no longer see flour streaks or lumps. Overmixing at this stage could make your blondies tough, so keep it light and gentle.

Step 5: Add Reese’s Pieces and Chocolate Chips

Fold in the Reese’s Pieces and chocolate chips delicately, spreading the candy and choco-love evenly throughout the batter for a playful crunch and bursts of sweetness in every bite.

Step 6: Bake the Blondies

Pour the batter into your prepared pan, smoothing out the top evenly. Bake for approximately 30 minutes, or until the edges are set and a toothpick inserted in the center comes out clean or with a few moist crumbs. If you prefer a less gooey center, extend the baking time up to 35 minutes.

Step 7: Cool and Slice

Allow the blondies to cool completely in the pan. Use the parchment paper overhang to lift them out easily, then cut with a sharp knife into generous bars. Cooling is key to allowing the blondies to firm up perfectly while keeping the chocolate melty and Reese’s Pieces intact.

How to Serve Peanut Butter Blondies Recipe

A clear glass bowl sits on a white marbled surface, filled with a smooth, thick, light brown batter spread evenly at the bottom. On top of the batter, there are two separate piles of small candy pieces: one pile is dark brown chocolate chips clustering closely together, and next to it is a mix of small round candies in bright orange, yellow, and a few dark brown colors. To the upper right of the bowl rests a spatula with a black silicone head and a wooden handle. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

Feel free to sprinkle a light dusting of powdered sugar on top or drizzle warm melted peanut butter or chocolate over the cooled blondies for an extra touch of decadence. A few chopped peanuts sprinkled on top can enhance the texture and bring more peanut flavor.

Side Dishes

Peanut Butter Blondies pair wonderfully with a scoop of vanilla ice cream or a dollop of whipped cream for a classic dessert experience. Fresh fruit on the side, like sliced bananas or strawberries, adds a refreshing contrast that balances the richness.

Creative Ways to Present

For parties or gift-giving, cut the blondies into bite-sized squares and stack them on a decorative plate or wrap them individually in parchment paper tied with ribbon. You can also serve them alongside coffee or hot chocolate for a cozy afternoon treat.

Make Ahead and Storage

Storing Leftovers

Store any leftover Peanut Butter Blondies in an airtight container at room temperature for up to four days. This keeps them soft and chewy, perfectly ready to enjoy whenever a sweet craving hits.

Freezing

If you want to save some for later, these blondies freeze beautifully. Place cooled bars in an airtight container with wax paper layers between to prevent sticking. Frozen, they stay fresh for up to two months—ideal for quick treats anytime.

Reheating

To bring frozen or refrigerated blondies back to life, reheat gently in the microwave for about 20 seconds or warm them in a low oven until just soft. This revives that gooey, melty texture we all adore without drying them out.

FAQs

Can I use crunchy peanut butter instead of smooth in this Peanut Butter Blondies Recipe?

Absolutely! Crunchy peanut butter will add a bit more texture, which can be a fun twist. However, smooth peanut butter is recommended for the most consistent and creamy results.

What can I substitute if I don’t have Reese’s Pieces?

You can substitute with peanut butter chips, chopped peanut butter cups, or simply add more chocolate chips. These options keep the flavor and texture exciting and delicious.

Is it necessary to line the baking pan with parchment paper?

While not mandatory, lining the pan with parchment paper makes it so much easier to lift the blondies out for slicing and helps prevent sticking. If you don’t have parchment, a well-greased pan will suffice.

Can I make these blondies gluten-free?

Yes! Substitute the all-purpose flour with a gluten-free flour blend that measures cup-for-cup. Just keep in mind that texture may vary slightly based on the blend you choose.

How do I know when the blondies are done baking?

The edges will look set and golden, and a toothpick inserted in the center should come out clean or with a few moist crumbs. If you prefer a chewy, gooey center, aim for about 30 minutes; longer baking will yield firmer bars.

Final Thoughts

This Peanut Butter Blondies Recipe is a delightful celebration of peanut butter and chocolate, so comforting and easy to whip up any time you want a homemade treat. Once you try these bars, you’ll understand why they’re a beloved snack that brings joy to every bite. Go ahead, dive in, and share the deliciousness with your favorite people!