Some desserts are just ridiculously easy — and these
3-Ingredient Peanut Butter Blondies are proof. Rich, chewy, and packed with peanut butter flavor, they come together in one bowl with just three pantry staples: creamy peanut butter, brown sugar, and an egg.
They’re flourless, which means they’re naturally gluten-free, and they bake up with a fudgy, chewy texture that’s completely irresistible. They’re the kind of dessert you can whip up on a whim, when a craving strikes or when you need a quick treat for a gathering.
Prep takes 5 minutes, they bake in 20 to 25 minutes, and the recipe makes 9 squares. Perfect for a quick baking day, a last-minute dessert, or anytime you want a simple, satisfying treat.
Recipe Card
3-Ingredient Peanut Butter Blondies 🥜
Rich, chewy, and packed with peanut butter flavor — a simple flourless dessert made with just three ingredients.
Prep Time: 5 minutes |
Cook Time: 25 minutes |
Total Time: 30 minutes
Makes: 9 squares
Ingredients
- 1 cup creamy peanut butter
- 1 cup packed light brown sugar
- 1 large egg
Instructions
- Prepare the oven and pan: Preheat the oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper, leaving a little overhang for easier removal, or lightly grease the pan.
- Combine the batter: Add the creamy peanut butter, packed brown sugar, and egg to a medium mixing bowl. Stir until the mixture is completely blended, smooth, and uniformly thick.
- Fill the baking pan: Spoon the batter into the prepared pan. Use a spatula to press and spread it into an even layer, then level the surface.
- Bake the blondies: Place the pan in the preheated oven and bake for 20–25 minutes, or until the edges are lightly golden and the center appears set.
- Cool before cutting: Remove the pan from the oven and allow the blondies to cool completely in the pan. Once firm and cool, lift them out using the parchment paper if applicable and cut into 9 squares.
Why This Recipe Works
The creamy peanut butter is the star of the show. It provides the rich, nutty flavor and the fudgy, chewy texture that makes these blondies so irresistible. It also acts as the main structure of the recipe.
The brown sugar adds sweetness, moisture, and depth. Brown sugar contains molasses, which gives the blondies a deeper, caramel-like flavor and helps keep them moist and chewy.
The egg binds everything together. It provides structure and richness, ensuring the blondies hold their shape and bake up with the perfect texture.
Three ingredients mean zero fuss. Peanut butter, brown sugar, and an egg. That’s it. No flour, no butter, no baking powder. Just three simple ingredients that come together into something extraordinary.
They’re naturally flourless and gluten-free. Because there’s no flour in the recipe, these blondies are naturally gluten-free, making them a great option for anyone with dietary restrictions.
They bake up fudgy and chewy. The lack of flour means these blondies have a dense, fudgy texture that’s more like a brownie than a cake. They’re rich, satisfying, and completely addictive.
They come together in about 30 minutes from start to finish. With just 5 minutes of prep and 25 minutes of baking, these blondies are perfect for a quick dessert or a last-minute treat.
Pro Tips for Perfect Results Every Time
Use creamy peanut butter, not natural. Natural peanut butter separates and can make the blondies oily. Regular creamy peanut butter (like Jif or Skippy) gives you the best texture and flavor.
Pack the brown sugar firmly into the measuring cup. This ensures you get the right amount of sugar and the proper moisture content.
Stir the batter until it’s completely smooth. Make sure the peanut butter, brown sugar, and egg are fully combined and the batter is uniformly thick.
Line the pan with parchment paper. Leaving a little overhang makes it easy to lift the blondies out of the pan after baking.
Spread the batter evenly in the pan. An even layer ensures even baking and consistent texture in every square.
Don’t overbake. The blondies are done when the edges are lightly golden and the center appears set. Overbaking makes them dry and crumbly.
Let the blondies cool completely before cutting. They continue to firm up as they cool. Cutting them while warm will make them crumbly and messy.
Use a sharp knife and wipe it between cuts. A sharp knife and a clean blade give you neat, picture-perfect squares.
Add a sprinkle of flaky sea salt. A pinch of flaky sea salt over the top before baking adds a sweet-salty contrast that’s absolutely delicious.
Store them in an airtight container. They stay fresh and chewy for days.
Variations and Substitutions
Use crunchy peanut butter. For extra texture, substitute crunchy peanut butter for the creamy. The blondies will have a little more crunch.
Add chocolate chips. A half-cup of semisweet chocolate chips stirred into the batter adds a rich, chocolatey twist.
Add chopped nuts. Chopped peanuts, pecans, or walnuts stirred into the batter add crunch and flavor.
Add a chocolate drizzle. A drizzle of melted chocolate over the cooled blondies adds a decadent finish.
Add a caramel drizzle. A drizzle of caramel sauce over the cooled blondies adds a sweet, buttery finish.
Make it a salted peanut butter version. Sprinkle flaky sea salt over the top before baking for a sweet-salty contrast.
Make it a peanut butter cup version. Press mini peanut butter cups into the batter before baking for a fun, candy-studded twist.
Make it dairy-free. Use dairy-free peanut butter and verify that all other ingredients are dairy-free.
Make it gluten-free. This recipe is naturally gluten-free as written. Verify that your peanut butter is gluten-free.
Make it a brownie version. Add 2 tablespoons of cocoa powder to the batter for a chocolate-peanut butter version.
Storage and Reheating
Room temperature: Store the cooled blondies in an airtight container at room temperature for up to 5 days.
Refrigerator: For longer storage, keep the blondies in an airtight container in the refrigerator for up to 1 week. Bring to room temperature before serving.
Freezer: These blondies freeze beautifully. Cut them into squares, wrap each one tightly in plastic wrap and foil, and freeze for up to 3 months. Thaw at room temperature before serving.
Make ahead: These blondies are ideal for making ahead. Prepare them up to 5 days in advance and store them in an airtight container at room temperature.
No reheating needed: These blondies are best at room temperature. If you prefer them warm, a quick 10–15 seconds in the microwave brings back that fresh-baked softness.
Food safety: Since these blondies contain eggs, don’t leave them at room temperature for more than 2 hours. Store in an airtight container.
What to Serve With Them
These blondies are delicious on their own, but a few accompaniments take them to the next level:
- A cold glass of milk — the classic pairing
- A cup of hot coffee or tea
- A scoop of vanilla ice cream for an indulgent dessert
- A drizzle of chocolate or caramel sauce
- A sprinkle of flaky sea salt for a sweet-salty finish
- Fresh berries for a tart contrast
Frequently Asked Questions
Can I use natural peanut butter?
It’s not recommended. Natural peanut butter separates and can make the blondies oily. Use regular creamy peanut butter for the best texture.
Can I use crunchy peanut butter?
Yes. Crunchy peanut butter adds extra texture to the blondies. It’s delicious either way.
Why did my blondies turn out dry?
They were overbaked. Remove them from the oven when the edges are lightly golden and the center appears set. They will continue to firm up as they cool.
Why did my blondies turn out oily?
The peanut butter was too natural or oily, or the batter wasn’t stirred well enough. Use regular creamy peanut butter and stir until smooth.
Can I add chocolate chips?
Yes. A half-cup of semisweet chocolate chips stirred into the batter adds a rich, chocolatey twist.
Can I make these ahead of time?
Yes. Prepare them up to 5 days in advance and store them in an airtight container at room temperature.
Can I freeze these blondies?
Yes, for up to 3 months. Cut them into squares, wrap each one tightly in plastic wrap and foil, and freeze. Thaw at room temperature before serving.
Can I make these gluten-free?
Yes. This recipe is naturally gluten-free as written. Verify that your peanut butter is gluten-free.
Can I make these dairy-free?
Yes. Use dairy-free peanut butter and verify that all other ingredients are dairy-free.
Can I add a chocolate drizzle?
Yes. A drizzle of melted chocolate over the cooled blondies adds a decadent finish.
How long do these last?
Up to 5 days at room temperature in an airtight container, or up to 1 week in the refrigerator.
Can I double this recipe?
Yes. Use a 9×13-inch baking pan and double the ingredients. Adjust the bake time as needed.
Final Thoughts
These
3-Ingredient Peanut Butter Blondies are everything an easy dessert should be: rich, chewy, and packed with peanut butter flavor. They come together in one bowl with just three ingredients, and they’re naturally flourless and gluten-free.
They’re perfect for a quick baking day, a last-minute dessert, or anytime you want a simple, satisfying treat. And because they store beautifully and freeze well, you can enjoy them for days.
If you make these blondies, I’d love to hear how they turned out. Did you add chocolate chips? Sprinkle on flaky sea salt? Try a caramel drizzle? Drop a comment below and let me know — and if you’re planning to make them, save this recipe for your next quick baking day.
