3-Ingredient Peanut Butter Blondies

3. Add the Egg

Crack the egg into the peanut butter mixture.

Stir thoroughly until the egg is completely incorporated and the batter becomes smooth and thick. Continue mixing only until everything is evenly combined.

The batter will be considerably thicker than a typical cake batter. That's exactly what you want.

4. Transfer the Batter to the Pan

Spoon the batter into your prepared baking pan.

Because the mixture is thick, use a spatula to spread it evenly from corner to corner. Try to create a relatively level surface so the blondies bake uniformly.

5. Bake

Place the pan in the preheated oven and bake for approximately 18–25 minutes.

The exact baking time can vary depending on your oven and how soft or firm you prefer your blondies.

Look for edges that appear set and lightly browned while the center remains slightly soft. Avoid overbaking, because the blondies will continue to firm up as they cool.

6. Let Them Cool

Remove the pan from the oven and place it on a cooling rack.

Allow the blondies to cool completely in the pan before cutting. This step is important because the center will continue setting as it cools.

For especially clean slices, you can chill the cooled blondies briefly before cutting them.

7. Cut and Serve

Once completely cooled, lift the blondies from the pan using the parchment paper.

Place them on a cutting board and slice them into squares or rectangles.

Serve them as they are, or pair them with a scoop of vanilla ice cream for an extra-indulgent dessert.

Tips for Perfect Peanut Butter Blondies

Don't overmix the batter. Mix until the ingredients are just fully incorporated. Excessive mixing isn't necessary for this simple recipe.

Don't overbake. The blondies should look set around the edges while the center still has a little softness. Baking them too long can result in dry, crumbly blondies.

Use creamy peanut butter. Smooth peanut butter makes the batter easier to combine and gives the blondies a consistent texture.

Let them cool before slicing. Freshly baked blondies are delicate. Allowing them to cool gives the center time to firm up and makes cutting much easier.

Use parchment paper. This isn't essential, but it makes removing the finished blondies from the pan significantly easier.

Easy Variations

Although the classic version needs only three ingredients, you can turn these blondies into something different with a few optional additions.

For a chocolate-peanut butter combination, fold a handful of chocolate chips into the batter before baking.

For extra crunch, add some chopped roasted peanuts.

A light sprinkle of flaky sea salt over the top before baking can also create a delicious sweet-and-salty contrast.

If you enjoy stronger peanut butter flavor, swirl a small amount of additional peanut butter over the surface of the batter before placing the pan in the oven.

How to Store Them

Store completely cooled blondies in an airtight container at room temperature for several days.

For longer storage, place them in an airtight freezer-safe container and freeze them individually or with parchment paper between the layers. Allow them to thaw at room temperature before serving.

A few seconds in the microwave can also gently warm a blondie before serving, especially if you want that freshly baked texture.

Final Thoughts

These 3-Ingredient Peanut Butter Blondies demonstrate that homemade desserts don't always require a complicated recipe. With peanut butter, brown sugar, and an egg, you can create a rich and satisfying treat with minimal preparation.

The key to getting the best results is to avoid overbaking and allow the blondies enough time to cool before slicing. Once you've tried the basic recipe, you can easily customize it with chocolate chips, peanuts, or a touch of sea salt.

Whether you're looking for a quick afternoon treat, an easy dessert for guests, or simply a way to satisfy a peanut butter craving, these blondies are a wonderfully simple recipe to have on hand.