Chewy Peanut Butter Blondies are my go-to bar when I want something easy, rich, and not fussy. They bake up with deep brown sugar flavor, that classic peanut butter taste, and a soft fudgy center.
I like this version because it stays thick and chewy instead of cakey, with edges that set and a middle that stays tender. The peanut butter comes through clearly, and the batter is sturdy enough to handle chocolate chips and chopped peanuts if you want them.
These are especially good for bake sales, cookie trays, and weekend snacking because they slice clean once cooled. I usually serve them as simple squares, but they’re also great plated with coffee or a cold glass of milk.
Why You’ll Love This Recipe
Soft and Chewy: The texture hits that sweet spot—set around the edges with a center that stays fudgy and tender.
One-Bowl Batter: It’s a straightforward mix-and-bake kind of recipe, and cleanup is minimal.
Brown Sugar Flavor: Brown sugar gives these blondies a deeper, caramel-like sweetness that works so well with peanut butter.
Chocolate Chips Optional: I love the semisweet chips here, but the base recipe is just as good if you want them plain.
Easy to Slice: Once they’re fully cooled, you get neat squares that hold together (and don’t crumble everywhere).
Ingredients You’ll Need
Batter
- Unsalted butter: Melted butter keeps this easy and gives you that chewy bar texture. Let it cool a bit so it doesn’t scramble the eggs.
- Light brown sugar: This is where most of the flavor comes from, so use fresh, soft brown sugar if you can. Dark brown sugar works too for a slightly stronger molasses taste.
- Creamy peanut butter: I use regular creamy peanut butter for the most consistent texture. If you swap in natural peanut butter, make sure it’s really well stirred first.
- Eggs: Room temperature eggs mix in more smoothly and help the batter turn thick and cohesive.
- Vanilla extract: Don’t skip it—vanilla rounds out the peanut butter and brown sugar.
- All-purpose flour: Regular flour is what I use here. Measure it lightly so the blondies don’t turn dry.
- Baking powder: Just enough lift so they don’t bake up dense like fudge, but still stay blondie-textured.
- Fine salt: Peanut butter needs salt. It keeps the bars from tasting flat.
Mix-ins
- Semisweet chocolate chips: Semisweet is my go-to with peanut butter. Milk chocolate works if you want them sweeter.
- Chopped peanuts: Totally optional, but they add a nice crunch. I like a rough chop so you still get little bites of peanut.
Recipe Instructions
- Preheat the oven: Heat the oven to 350°F and set the rack in the center. Line a 9×9-inch baking pan with parchment paper and lightly grease it.
- Whisk butter and sugar: In a large bowl, whisk the melted, cooled butter and brown sugar until the mixture looks glossy and smooth.
- Add peanut butter: Whisk in the peanut butter until it’s fully combined and the mixture looks even.
- Add eggs and vanilla: Whisk in the eggs and vanilla until the batter looks thicker and cohesive.
- Add dry ingredients: Fold in the flour, baking powder, and salt just until you don’t see dry flour left.
- Add mix-ins: Fold in the chocolate chips and chopped peanuts, if using.
- Fill the pan: Spread the batter evenly in the prepared pan and smooth the top.
- Bake: Bake for 22 to 28 minutes, until the edges are set and the center is still slightly soft. A toothpick should come out with a few moist crumbs.
- Cool: Cool completely in the pan for the cleanest slices and the best chew.
- Slice: Lift out with the parchment, then cut into 16 squares.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Slightly underbake them. Pull the pan when the edges look set but the center still looks a little soft. They keep cooking as they cool, and that’s what gives you the chewy middle.
Cool completely before cutting. If you slice while they’re warm, the center can stick and crumble. Once they’re cool, they cut into neat squares.
Use parchment paper. Blondies are much easier to lift out and slice when you can pull the whole slab out of the pan. It also helps if a few chips melt against the edges.
Stir natural peanut butter really well. If you’re using the natural kind, make sure it’s fully mixed before you start. If it’s oily or separated, the texture can get a little greasy.
Don’t go too heavy on mix-ins. You can add more, but keep the total mix-ins to about a cup so the bars still hold together and bake evenly.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Milk: A cold glass of milk is simple and classic with peanut butter blondies. I like this most when the bars are at room temperature.
- Coffee: These are really good with coffee, especially if you used chocolate chips. A latte or plain black coffee both work.
- Ice cream: Serve a square with vanilla ice cream on the side if you want a more “dessert” plate. A little chocolate sauce is nice too.
- Fruit: Fresh strawberries or raspberries are great with the peanut butter flavor. It’s an easy way to add something lighter alongside.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store the blondies airtight at room temperature for up to 3 days. I usually keep them in the pan with a tight cover, or move squares into a container with a lid.
If you want to make them ahead for a party or bake sale, bake them the day before and leave them uncut until you need them. They stay chewier that way.
For longer storage, you can freeze the blondies for up to 2 months. I like freezing individual squares so you can grab one at a time.
Thaw at room temperature, or give a square a quick 10 to 15 seconds in the microwave if you want it slightly warm.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
How do I know when peanut butter blondies are done?
Look for set edges and a center that’s still slightly soft. A toothpick should come out with a few moist crumbs, not wet batter.
If you bake until the toothpick is totally clean, they’ll still taste good, but they’ll be more cakey and less chewy.
Can I use natural peanut butter?
You can, but it needs to be well stirred so it’s not oily or separated. I usually get the most consistent texture with regular creamy peanut butter.
Can I leave out the chocolate chips and peanuts?
Yes. The base blondie is great on its own, and it really lets the brown sugar and peanut butter flavor stand out.
Why did my blondies turn out dry?
The most common reasons are overbaking or measuring flour too heavily. I’d pull them a little earlier next time, and spoon flour into the measuring cup instead of packing it in.
Can I add more mix-ins?
Yes, just don’t go overboard. I’d keep it to about 1 cup total mix-ins so the bars still slice well and don’t end up underbaked in the middle.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Chewy Peanut Butter Blondies
INGREDIENTS
Batter
- 1/2 cup unsalted butter melted and cooled
- 1 cup light brown sugar packed
- 1/2 cup creamy peanut butter
- 2 large eggs room temperature
- 2 tsp vanilla extract
- 1 1/4 cups all purpose flour
- 1 tsp baking powder
- 1/2 tsp fine salt.
Mix ins
- 3/4 cup semisweet chocolate chips optional
- 1/4 cup chopped peanuts optional.
INSTRUCTIONS
Prep
- Heat oven to 350 F and position rack in center
- line a 9x9 inch baking pan with parchment and lightly grease
- whisk melted butter and brown sugar until glossy and smooth
- whisk in peanut butter until fully combined
- whisk in eggs and vanilla until thick and cohesive
- fold in flour baking powder and salt just until no dry flour remains
- fold in chocolate chips and peanuts if using
- spread batter evenly in prepared pan.
Bake and cool
- Bake until edges are set and center is slightly soft with a toothpick showing a few moist crumbs 22 to 28 minutes
- cool completely in pan for clean slices and best chew
- lift out and cut into 16 squares.
