Why You’ll Love This Peanut Butter Blondies
Peanut Butter Blondies are the perfect treat for anyone who loves the rich, nutty flavor of peanut butter combined with the sweetness of chocolate. They are soft, chewy, and filled with delicious surprises like Reese’s Pieces and chocolate chips. These blondies don’t just taste amazing—they are also easy to make, making them an excellent choice for both novice and experienced bakers. You’ll love the way these blondies can satisfy your sweet tooth while giving you a comforting taste of peanut butter goodness.
Why Make This Recipe
Making Peanut Butter Blondies at home is a fantastic way to treat yourself and others to a delightful dessert. This recipe combines simple ingredients you likely already have in your kitchen. It takes just one bowl to mix everything together, making cleanup a breeze. The aroma that fills your home as these bars bake is irresistible. Whether you’re preparing for a family gathering, a party, or just want to enjoy a sweet snack at home, these blondies are sure to impress everyone who gets a taste.
What You Need for Peanut Butter Blondies
To make Peanut Butter Blondies, you’ll need the following ingredients:
- 2/3 cup unsalted butter (170 grams)
- 3/4 cup peanut butter (about 270 grams)
- 2 cups light brown sugar (420 grams)
- 2 teaspoons vanilla extract
- 3 large eggs
- 2 cups all-purpose flour (250 grams)
- 1/4 teaspoon salt
- 3/4 cup Reese’s Pieces (about 140 grams)
- 3/4 cup chocolate chips (about 120 grams)
These ingredients blend together to create a harmonious mix of flavors and textures, ensuring each bite is satisfying and delicious.

How to Make Peanut Butter Blondies
Making Peanut Butter Blondies is simple and straightforward. Just follow these steps to whip up a batch:
Preheat Your Oven: Start by preheating your oven to 350°F (180°C). This ensures that your blondies bake evenly.
Prepare Your Pan: Line a 9×13 inch baking pan with parchment paper, letting the paper hang over the sides. This makes it easy to lift your blondies out later. If you prefer, you can lightly grease the pan instead.
Melt the Butter and Peanut Butter: In a large, microwave-safe bowl, melt together the unsalted butter and peanut butter. Stir the mixture until it is smooth and completely combined.
Mix in the Sugar and Eggs: Add the light brown sugar to the butter and peanut butter mix. Whisk in the eggs and vanilla extract, making sure there are no visible pieces of egg. This step is crucial for a uniform texture.
Fold in Dry Ingredients: Gently fold the all-purpose flour and salt into the mixture. Be careful not to over-mix; you should stop as soon as there are no visible streaks of flour.
Add Chocolate and Candy: Fold in the Reese’s Pieces and chocolate chips, ensuring they are evenly distributed throughout the batter.
Pour into the Pan: Spoon or pour the batter into the prepared baking pan. Spread the top smooth with a spatula.
Bake: Place the pan in the oven and bake for about 30 minutes. The top should look set, and a toothpick inserted into the center should come out clean or with a few damp crumbs. If you prefer your blondies less gooey, consider extending the bake time to 35 minutes.
Cool and Slice: Let the blondies cool in the pan. When they are ready to slice, use the overhang of the parchment paper to lift them out. Place them on a cutting board and slice them with a thin, sharp knife. Wait for about 2 1/2 hours for the bars to cool fully; this will keep the chocolate chips and Reese’s Pieces melty and delicious.
Best Ways to Serve Peanut Butter Blondies
Peanut Butter Blondies can be enjoyed in many ways. You can serve them as they are, or for an extra indulgent treat, warm them up slightly and serve them with a scoop of vanilla ice cream. Drizzling a bit of chocolate or caramel sauce over the top makes for an elegant presentation. For added flavor, try dusting the blondies with a pinch of sea salt, which can enhance the sweetness and richness of the peanut butter.
How to Store Peanut Butter Blondies
You can store Peanut Butter Blondies easily. Allow them to cool completely after baking. Once cool, place them in an airtight container. They will stay fresh for up to a week when stored at room temperature. If you want to keep them longer, you can freeze the blondies. Just wrap them tightly in plastic wrap and then place them in an airtight freezer bag. They can be stored in the freezer for up to three months. When ready to enjoy, simply thaw them at room temperature or warm them gently in the microwave.
Easy Tips to Make Peanut Butter Blondies
- Use Room Temperature Ingredients: Having your eggs and butter at room temperature will help them mix together more smoothly, resulting in a better texture.
- Don’t Overmix: When adding the flour, mix just until incorporated. Overmixing can lead to dense blondies.
- Experiment with Mix-Ins: Feel free to swap out the Reese’s Pieces for other candy like butterscotch chips, nuts, or even dried fruit to match your taste.
- Check for Doneness: Everyone’s oven is different, so it’s important to start checking your blondies a few minutes before the recommended baking time.
Try These Variations of Peanut Butter Blondies
- Nutty Twist: Add chopped nuts such as walnuts or almonds for added crunch.
- Peanut Butter Swirl: Swirl extra peanut butter into the batter before baking for a richer flavor.
- Oreo Blondies: Replace Reese’s Pieces with crushed Oreo cookies for a fun cookies-and-cream flavor.
Common Questions About Peanut Butter Blondies
How do I know when my blondies are done baking?
To check for doneness, look for a set top and a toothpick that comes out clean or with a few crumbs. If it comes out with wet batter, give them a few more minutes. Remember, they will continue to cook a bit as they cool.
Can I use natural peanut butter?
Yes, but natural peanut butter may lead to a different texture. If using natural peanut butter, look for one with minimal added ingredients, and expect a slightly different flavor and consistency.
How can I make these blondies gluten-free?
You can substitute all-purpose flour with a 1:1 gluten-free flour blend. Make sure to check that your other ingredients are gluten-free as well.

Final Thoughts
Peanut Butter Blondies are a simple and scrumptious dessert that everyone will love. With the delightful combination of peanut butter, chocolate, and candies, they provide a satisfying treat for any occasion. Enjoy the process of making these bars, and revel in the joy they bring to your taste buds and your loved ones. Ready to give it a try? Grab your ingredients and start baking these decadent blondies today!
Print
Peanut Butter Blondies
- Total Time: 45 minutes
- Yield: 24 servings 1x
- Diet: Vegetarian
Description
Deliciously rich and chewy peanut butter blondies filled with chocolate chips and Reese’s Pieces.
Ingredients
- 2/3 cup unsalted butter (170 grams)
- 3/4 cup peanut butter (about 270 grams)
- 2 cups light brown sugar (420 grams)
- 2 teaspoons vanilla extract
- 3 large eggs
- 2 cups all-purpose flour (250 grams)
- 1/4 teaspoon salt
- 3/4 cup Reese’s Pieces (about 140 grams)
- 3/4 cup chocolate chips (about 120 grams)
Instructions
- Preheat your oven to 350°F (180°C).
- Prepare a 9×13 inch baking pan with parchment paper.
- Melt the unsalted butter and peanut butter together in a microwave-safe bowl.
- Mix in the light brown sugar, whisking in the eggs and vanilla extract.
- Fold in the all-purpose flour and salt until just combined.
- Add the Reese’s Pieces and chocolate chips, folding gently.
- Pour the batter into the prepared baking pan.
- Bake for about 30 minutes, until set.
- Cool in the pan before slicing into squares.
Notes
For an indulgent twist, serve with vanilla ice cream and a drizzle of chocolate sauce.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 blondie
- Calories: 290
- Sugar: 20g
- Sodium: 150mg
- Fat: 15g
- Saturated Fat: 6g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 1g
- Protein: 5g
- Cholesterol: 30mg
