Peanut Butter Blondies Recipe
If you’re looking for a sweet treat that combines the irresistible flavors of peanut butter and chocolate, then look no further than this Peanut Butter Blondies Recipe. These blondies are incredibly rich, chewy, and packed with peanut butter goodness. The addition of Reese’s Pieces and mini peanut butter cups makes every bite a delightful experience. Whether you’re baking for a family gathering, a potluck, or just for yourself, these blondies are guaranteed to impress. Let’s dive into the details of this delicious recipe!
Why It’s Crowd-Pleasing

Peanut butter blondies are a universal favorite, appealing to both kids and adults alike. The combination of creamy peanut butter with sweet chocolate creates a flavor profile that is simply irresistible. These blondies have a fudgy texture that melts in your mouth, while the crunchy bits of Reese’s Pieces and mini peanut butter cups add an exciting contrast. They are perfect for sharing—everyone will be reaching for seconds!
Ingredient Checklist
- 1 cup unsalted butter, melted and slightly cooled to room temperature
- 1 cup white granulated sugar
- 1 cup brown sugar
- 3/4 cup creamy peanut butter
- 2 large eggs
- 1 egg yolk
- 1 tablespoon pure vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon baking powder
- 1 teaspoon salt
- 1 cup Reese’s Pieces
- 1 cup mini peanut butter cups
Equipment at a Glance
- Mixing bowls – for combining ingredients
- Whisk – to mix the wet ingredients smoothly
- Spatula – for folding in the flour and chocolate
- 9×13 inch baking pan – to bake the blondies
- Parchment paper – for easy removal of blondies from the pan
How to Prepare Peanut Butter Blondies Recipe

Step 1: Preheat the Oven
Start by preheating your oven to 350°F (175°C). This ensures that your blondies bake evenly and develop that perfect chewy texture.
Step 2: Prepare the Baking Pan
Line a 9×13 inch baking pan with parchment paper, leaving some overhang on the sides for easy removal later. This step is crucial for preventing the blondies from sticking.
Step 3: Combine the Wet Ingredients
In a large mixing bowl, whisk together the melted butter, white granulated sugar, and brown sugar until well combined. Add in the creamy peanut butter, eggs, egg yolk, and pure vanilla extract. Whisk until the mixture is smooth and creamy.
Step 4: Mix the Dry Ingredients
In a separate bowl, combine the all-purpose flour, baking powder, and salt. Gently stir the dry ingredients together to ensure that the baking powder and salt are evenly distributed.
Step 5: Combine Wet and Dry Ingredients
Gradually add the dry ingredients to the wet mixture. Use a spatula to fold the ingredients together until just combined. Be careful not to overmix, as this can lead to dense blondies.
Step 6: Fold in the Mix-Ins
Gently fold in the Reese’s Pieces and mini peanut butter cups, ensuring they are evenly distributed throughout the batter.
Step 7: Bake the Blondies
Pour the batter into the prepared baking pan and spread it out evenly. Bake in the preheated oven for about 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
Step 8: Cool and Cut
Once baked, remove the blondies from the oven and allow them to cool in the pan for about 10 minutes. Then, use the parchment overhang to lift them out of the pan and transfer them to a wire rack to cool completely before cutting into squares.
Texture-Safe Substitutions

- For a gluten-free version, substitute all-purpose flour with a 1:1 gluten-free baking mix.
- If you prefer a nut-free option, replace creamy peanut butter with sunflower seed butter.
- Use dark brown sugar for a deeper flavor.
- Replace Reese’s Pieces with chocolate chips for a simpler chocolate flavor.
Missteps & Fixes
- Overbaking: Keep an eye on your blondies as they bake. If they become too dry, they will lose their chewy texture. Aim for just slightly underbaked for a perfect result.
- Blondies sticking to the pan: Always use parchment paper or grease the pan well to prevent sticking.
- Bland flavor: Ensure you are using fresh ingredients, especially the peanut butter and vanilla extract, to enhance the overall taste.
- Too crumbly: If your blondies crumble when cutting, they may need a little more moisture. Consider adding a splash of milk to the batter next time.
Keep-It-Fresh Plan
To keep your Peanut Butter Blondies fresh, store them in an airtight container at room temperature for up to 5 days. If you’d like to keep them longer, you can freeze the blondies for up to 3 months. Just make sure to wrap them tightly in plastic wrap and place them in a freezer-safe container. When you’re ready to enjoy them, simply thaw at room temperature or warm them up in the microwave for a few seconds.
Questions People Ask
Can I use crunchy peanut butter instead of creamy?
Yes, you can use crunchy peanut butter if you enjoy a bit of texture in your blondies. Just be aware that it will change the consistency slightly.
What’s the best way to cut blondies into squares?
For clean cuts, use a sharp knife and cut the blondies while they are still slightly warm. Run the knife under hot water and dry it off between cuts for even better results.
Can I add other mix-ins to the blondies?
Absolutely! Feel free to experiment with different mix-ins such as chopped nuts, chocolate chips, or even dried fruit for a unique twist on the classic recipe.
What can I serve with peanut butter blondies?
These blondies are delicious on their own, but they pair wonderfully with a scoop of vanilla ice cream or a drizzle of chocolate sauce for an extra indulgent dessert.
Ready to Cook?
Now that you have all the details for making the best Peanut Butter Blondies Recipe, it’s time to get baking! Gather your ingredients and equipment, and let the delicious aroma of freshly baked blondies fill your kitchen. Whether you’re sharing with friends or keeping them all to yourself, these blondies are sure to become a favorite treat in your home. Enjoy every gooey, peanut buttery bite!

Peanut Butter Blondies Recipe
Ingredients
Equipment
Method
- Step 1: Preheat the OvenStart by preheating your oven to 350°F (175°C).
- Step 2: Prepare the Baking PanLine a 9x13 inch baking pan with parchment paper.
- Step 3: Combine the Wet IngredientsIn a large mixing bowl, whisk together melted butter, white granulated sugar, and brown sugar.
- Step 4: Mix the Dry IngredientsIn a separate bowl, combine the flour, baking powder, and salt.
- Step 5: Combine Wet and Dry IngredientsGradually add the dry ingredients to the wet mixture and fold until just combined.
- Step 6: Fold in the Mix-InsGently fold in the Reese's Pieces and mini peanut butter cups.
- Step 7: Bake the BlondiesPour the batter into the prepared pan and bake for 25-30 minutes.
- Step 8: Cool and CutAllow the blondies to cool for about 10 minutes before transferring to a wire rack.
Notes
- For gluten-free blondies, use a gluten-free baking mix.
- Store in an airtight container at room temperature for up to 5 days.
- For added flavor, use dark brown sugar instead of light.
