3-Ingredient Peanut Butter Blondies That Disappear Fast

Step 1: Prepare the Oven

Preheat your oven to 350°F (175°C).

Lightly grease an 8-inch baking dish, or line it with parchment paper so the finished blondies are easier to lift out.

Step 2: Mix the Ingredients

Add the peanut butter, brown sugar, and eggs to a medium bowl.

Stir until everything is thoroughly combined and the batter looks smooth and thick.

There shouldn't be obvious streaks of egg remaining.

Step 3: Fill the Baking Dish

Transfer the batter to your prepared dish.

Use a spatula to spread it evenly from corner to corner.

Because the batter is quite thick, taking a moment to smooth the surface helps the blondies bake more evenly.

Step 4: Bake

Place the dish in the preheated oven and bake for approximately 20–25 minutes.

Look for a lightly golden, puffed top and a center that is just set.

If you love a soft, fudgy middle, don't overbake them.

Step 5: Cool Before Slicing

Remove the pan from the oven and let the blondies cool for at least 20 minutes.

For especially clean slices, allow them to cool completely before cutting.

Then slice into nine squares and serve!

How to Get the Perfect Texture

The biggest trick with these blondies is not overbaking them.

If the center still looks slightly soft when you remove the pan, that's okay. The blondies will continue to set as they cool.

For a fudgier texture, stay toward the shorter end of the baking time.

For firmer squares that are easier to package for a bake sale, allow them a few additional minutes—but keep a close eye on them.

Tips for Perfect Peanut Butter Blondies

Use Regular Creamy Peanut Butter

This gives you the most predictable texture and makes mixing easy.

Don't Overmix

Once the ingredients are smoothly combined, you're done. There's no need to beat the batter excessively.

Watch the Baking Time

These blondies don't need a long time in the oven.

The difference between soft and chewy and overly firm can be just a few minutes.

Cool Before Cutting

I know it's tempting to grab a knife immediately!

But giving them time to cool helps the blondies firm up and makes slicing much easier.

Use a Clean Knife

For beautiful bake-sale squares, wipe the knife between cuts.

A brief chill in the refrigerator can also make the blondies particularly easy to slice neatly.

What to Serve With Peanut Butter Blondies

These blondies are delicious all by themselves, but there are plenty of fun ways to serve them.

For an Easy Dessert

Add a scoop of vanilla ice cream while the blondie is still slightly warm.

For a Simple Snack

Serve with cold milk, coffee, or hot tea.

For a Fresh Contrast

Add sliced strawberries or another fresh fruit alongside the rich peanut butter flavor.

For a Party

Cut the blondies into smaller bite-size squares and arrange them on a dessert platter.

They're rich, so smaller portions are perfect for sharing.

How to Store Peanut Butter Blondies

Once completely cooled, store the blondies in an airtight container.

Keep them at room temperature for short-term storage, or refrigerate them if you prefer a firmer, chilled texture.

For the best quality, keep them well covered so they don't dry out or absorb odors from other foods.

You can also freeze individual portions in suitable freezer-safe packaging and thaw them before serving.

Recipe at a Glance

Recipe: 3-Ingredient Peanut Butter Blondies
Yield: 9 squares
Prep time: About 5–10 minutes
Bake time: 20–25 minutes
Oven temperature: 350°F (175°C)
Difficulty: Easy

Frequently Asked Questions

Can I make these blondies with natural peanut butter?

Yes, but the results can vary. If the natural peanut butter is very oily or separated, stir it thoroughly before measuring. Regular creamy peanut butter generally produces the most consistent results.

Can I use crunchy peanut butter?

Absolutely. Crunchy peanut butter will give the blondies a little more texture and peanut crunch.

Why are my blondies too dry?

They may have been baked too long. Start checking them around the lower end of the suggested baking time and remove them when the center is just set.

Can I make these blondies fudgy?

Yes! The key is to avoid overbaking. Removing them when the center is just set will give you a softer, fudgier middle.

Can I add chocolate chips?

Definitely. Chocolate chips are one of the easiest additions and pair beautifully with peanut butter.

Why do my blondies fall slightly after baking?

A little settling as they cool is normal. The structure continues to firm as the blondies cool.

Can I cut them into more than nine pieces?

Of course. Nine squares make generous portions. For a bake sale or party, cutting them into smaller pieces is a great idea because they're quite rich.

The Bottom Line

Sometimes the simplest recipes really are the best.

These 3-ingredient peanut butter blondies take just peanut butter, brown sugar, and eggs and turn them into rich, chewy little squares that taste far more complicated than they actually are.

They're quick enough for a last-minute dessert, easy enough for beginner bakers, and delicious enough to earn a permanent spot in your recipe collection.

Add chocolate chips if you're feeling indulgent, sprinkle on a little sea salt if you love sweet-and-salty flavors, or keep them exactly as they are.

Either way, don't be surprised if you turn around and discover the whole pan has vanished!

If you make these blondies, leave a review and share a photo on Pinterest. I'd love to see how your batch turned out—and don't forget to save the recipe so you have it ready the next time a quick dessert is needed.

Approximate Nutrition

Per blondie, assuming 9 servings, the nutritional values will vary depending on the peanut butter and brown sugar used. A rough estimate is 300–330 calories, 15–17g fat, 35–40g carbohydrates, and 7–9g protein per square.