Peanut Butter Blondies

Name: Peanut Butter Blondies
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 2/3 cup unsalted butter; 3/4 cup peanut butter; 2 cups light brown sugar; 3 large eggs; 2 cups all-purpose flour; 3/4 cup Reese's Pieces; 3/4 cup chocolate chips

Published: December 19, 2025

by Simon

Why You’ll Love This Recipe

Quick and Easy: With only one bowl required and no mixer needed, this recipe is fast to prepare.
Delicious Flavor: The combination of peanut butter, chocolate chips, and Reese’s Pieces creates an irresistible taste sensation.
Versatile Treat: Perfect for parties, potlucks, or as an everyday snack.
Soft and Chewy Texture: These blondies have a wonderfully moist consistency that melts in your mouth.
Customizable: Feel free to swap out add-ins for your favorites; try different types of chocolate or nuts!

Tools and Preparation

To make these delicious Peanut Butter Blondies, you’ll need a few kitchen essentials. Gather these tools before starting your baking adventure.

Essential Tools and Equipment

Mixing bowl
Whisk
Measuring cups and spoons
Baking pan (9×13 inch)
Parchment paper or cooking spray
Sharp knife

Importance of Each Tool

Mixing bowl: A large bowl is essential for combining ingredients easily without spilling.
Whisk: This tool helps ensure that the ingredients are thoroughly mixed together for a consistent batter.
Baking pan: A 9×13 inch pan is the perfect size to create thick, chewy blondies that bake evenly.

Ingredients

For these delightful Peanut Butter Blondies, gather the following ingredients:

For the Blondie Base

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
3 large eggs
2 cups all-purpose flour (250 grams)
1/4 teaspoon salt

For the Add-Ins

3/4 cup Reese’s Pieces (about 140 grams)
3/4 cup chocolate chips (about 120 grams)

How to Make Peanut Butter Blondies

Step 1: Preheat the Oven

Preheat your oven to 350°F (180°C). This ensures the blondies bake evenly from the start.

Step 2: Prepare Your Pan

Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides for easy removal. Alternatively, lightly grease the pan if you prefer not to use parchment.

Step 3: Melt the Butters Together

In a large microwave-safe mixing bowl, melt together the unsalted butter and peanut butter. Heat in intervals until almost melted, then stir until smooth.

Step 4: Mix in Sugar and Eggs

Whisk in the light brown sugar until well combined. Then add in eggs and vanilla extract. Continue whisking until there are no visible pieces of egg.

Step 5: Combine Dry Ingredients

Gently fold in the all-purpose flour and salt into the mixture. Stop mixing once you see no streaks or lumps of flour.

Step 6: Add Chocolatey Goodness

Fold in the Reese’s Pieces and chocolate chips until evenly distributed throughout the batter.

Step 7: Bake Your Blondies

Spoon or pour the batter into your prepared pan and spread it out smoothly. Bake in your preheated oven for about 30 minutes. Check with a toothpick; it should come out clean or with just a few damp crumbs. If you like them less gooey, bake for up to 35 minutes.

Step 8: Cool Down Before Slicing

Allow the blondies to cool in the pan. When ready to slice, lift them out using the parchment overhang or cut directly if greased. Cool for at least 2 hours before slicing into squares with a thin knife—enjoy those melty chocolate bits!

How to Serve Peanut Butter Blondies

Peanut butter blondies are a delightful treat that can be served in various ways. Whether you’re hosting a gathering or enjoying a quiet night in, these serving suggestions will elevate your dessert experience.

With Ice Cream

Vanilla ice cream – A classic pairing that balances the richness of the blondies.
Chocolate ice cream – For chocolate lovers, this combination enhances the flavor profile.

Topped with Whipped Cream

Lightly sweetened whipped cream – Adds a fluffy texture and complements the chewy blondies nicely.
Flavored whipped cream – Consider vanilla or peanut butter-flavored for an extra kick.

Dusted with Powdered Sugar

Simple presentation – A light dusting of powdered sugar adds visual appeal and sweetness without overwhelming the flavors.

Served Warm

Microwave briefly – Warm blondies enhance their gooey texture and make chocolate chips melt even more.

How to Perfect Peanut Butter Blondies

Achieving the perfect peanut butter blondies is all about attention to detail. Follow these tips to ensure your dessert turns out delicious every time.

Use room temperature ingredients – This helps create a smoother batter and ensures even blending of flavors.
Don’t overmix – Gently fold in the flour to keep your blondies soft and chewy.
Check for doneness – Insert a toothpick; it should come out clean or with a few damp crumbs for that ideal gooey texture.
Allow proper cooling – Let them cool completely before cutting for cleaner slices and better texture.

Best Side Dishes for Peanut Butter Blondies

Pairing side dishes with your peanut butter blondies can enhance your dessert experience. Here are some tasty options to consider:

Fresh Fruit Salad – A refreshing mix of seasonal fruits balances the richness of the blondies.
Chocolate Dipped Strawberries – These decadent treats complement the peanut butter flavor beautifully.
Nutty Granola – A crunchy side adds texture that contrasts well with soft blondies.
Creamy Yogurt Parfait – Layered yogurt topped with granola offers a cool, creamy contrast.
Rice Crispy Treats – These chewy snacks provide another layer of sweetness without competing flavors.
Caramel Sauce Drizzle – A drizzle of caramel adds an indulgent touch that pairs perfectly with peanut butter.

Common Mistakes to Avoid

Making peanut butter blondies can be simple, but there are a few common mistakes that can lead to less-than-perfect results.

Overmixing the Batter: This can result in dense blondies. Mix just until the dry ingredients are combined.
Not Measuring Ingredients Accurately: Use a kitchen scale or proper measuring cups. Incorrect measurements can alter the texture and flavor.
Skipping the Cooling Time: Cutting into warm blondies can make them fall apart. Allow them to cool for at least 2 hours for better slicing.
Using Old Ingredients: Check your baking soda and flour freshness. Old ingredients can affect rise and taste.
Ignoring Oven Calibration: Every oven is different. Use an oven thermometer to ensure correct baking temperature for even cooking.

Storage & Reheating Instructions

Refrigerator Storage

Store in an airtight container.
Keep in the refrigerator for up to 1 week.

Freezing Peanut Butter Blondies

Wrap individually in plastic wrap or aluminum foil.
Place in a freezer-safe container for up to 3 months.

Reheating Peanut Butter Blondies

Oven: Preheat to 350°F (175°C) and warm for about 5-10 minutes.
Microwave: Heat each blondie for 15-20 seconds on medium power.
Stovetop: Warm in a skillet over low heat, covered, for about 2-3 minutes.

Frequently Asked Questions

Here are some common questions about making peanut butter blondies.

How do I know when my Peanut Butter Blondies are done?

The tops should look set, and a toothpick inserted should come out clean or with a few damp crumbs.

Can I substitute peanut butter?

Yes! You can use almond butter or any nut butter of your choice for a different flavor profile.

What if I don’t have brown sugar?

You can substitute it with an equal amount of granulated sugar mixed with a little molasses for similar flavor and texture.

Are Peanut Butter Blondies gluten-free?

To make gluten-free versions, replace all-purpose flour with a gluten-free flour blend.

Can I add nuts to my Peanut Butter Blondies?

Absolutely! Chopped nuts like walnuts or pecans can add great texture and flavor.

Final Thoughts

These peanut butter blondies are a delightful treat that’s sure to satisfy any sweet tooth. Their soft, chewy texture combined with rich flavors makes them perfect for any occasion. Feel free to customize them by adding your favorite mix-ins like nuts or different types of chocolate chips!

Did You Enjoy Making This Recipe? Please rate this recipe with ⭐⭐⭐⭐⭐ or leave a comment.

📖 Recipe Card