Peanut Butter Blondies
Rich, chewy Peanut Butter Blondies are SO easy to bake in your 8×8 pan with no mixer required! Bake as is for a sweet and salty nutty treat or decorate with a fudgy layer of chocolate.

That’s the perfect way to describe these Peanut Butter Blondies – chewy, fudgy peanut butter blondie bars with deep caramel butterscotch notes.
The best part about making peanut butter blondie bars? They’re SO easy to throw together, you don’t even need to break out the mixer!
Much like making my small batch brownies, you melt and whisk the batter in one pot on the stovetop then transfer to your 8×8 pan.
In fact, last week I made this peanut butter blondie recipe the same day I had a group meeting. Made them in the early afternoon then brought them for dessert at night. Easy peasy.
Pictured here are chocolate peanut butter blondies made with a thin layer of chocolate and Reese’s Pieces candy, but you can easily leave off the chocolate and serve as is.
Or swap in chopped peanuts, peanut butter cups, or chocolate chips such as semisweet, white chocolate, or peanut butter for the candy.

What is a blondie?
A blondie is a rich, chewy dessert bar that’s similar to brownies but gets its caramel flavor from brown sugar instead of chocolate.
They’re slightly different than my peanut butter cookie bars because blondies are more dense and gooey.
And much like brownies, you can have different flavor variations such as banana blondies or gingerbread blondies.
I made this peanut butter blondie recipe because it’s one of my favorite flavors.
Pair it up with chocolate and it’s a match made in heaven.

Ingredients For Peanut Butter Blondies
Here are the ingredients needed to make your peanut butter blondie bars! You’ll notice they are basic pantry ingredients and can be made at a moment’s notice:
- Butter: Melted butter is the key to giving blondies their rich, fudgy, chewy texture. Plus you don’t have to wait for it to soften at room temperature!
- Peanut butter: Use a creamy processed peanut butter as natural peanut butter can cause the blondies to be more dry and crumbly
- Brown sugar: Adds moisture and caramel flavor that granulated sugar cannot achieve
- Egg: Moisture needed for the batter plus helps with the chewy texture
- Vanilla: I bumped up the vanilla flavor as it really enhances the peanut butter
- Flour: Brings the dough together
- Baking powder: A bit of a controversial ingredient for blondies, I liked the batch with baking powder better than without (more on that below)
- Salt: I didn’t add as much salt because peanut butter is salty, but you still want a little bit to ensure your blondies aren’t bland.
- Mix-ins: Pictured here is Reese’s Pieces candy but you can also use chocolate chips or nuts.
- Baking chocolate: Made from ground cocoa nibs containing both cocoa solids and cocoa butter. Use semisweet chocolate that is around 55% cacao.
Do you add baking powder to blondies?
One controversial ingredient when making blondies is the baking powder.
I don’t add baking powder to my brownies because they tend to turn out a bit cakier; I want them dense and fudgy.
However when I made my peanut butter blondies the same way, they were too dense and really, really thin.
After testing it with baking powder, I loved the results so much better. They’re a bit softer and thicker without being too cakey.
I will pick blondies with baking powder every single time. However if you want really dense, thin blondies, this is the one time you can leave it out.

How To Make Peanut Butter Blondies
Ready to make your one pan chocolate peanut butter blondies? Leave the mixer off and grab a whisk!
- Melt together the butter and peanut butter.
- Whisk in brown sugar, egg, and vanilla.
- Stir in flour, baking powder, salt, and mix-ins of choice.
- Bake at 350F for 25-28 minutes or until edges pull away from the sides, center no longer looks wet, and a toothpick comes out with a few crumbs.
- Melt chocolate then spread on top of cooled blondies.
Store leftover blondies in an airtight container for up to 5 days.
How To Freeze Blondies
To freeze blondies, place cut blondies in a single layer on a cookie sheet or plate then freeze for 1 hour or until firm.
Wrap individually then place in a freezer bag. Freeze for up to 3 months.
More Peanut Butter Dessert Recipes
If you’re a peanut butter fanatic like me, check out these other dessert recipes using peanut butter:

Peanut Butter Blondies
Rich, chewy Peanut Butter Blondies are SO easy to bake in your 8×8 pan with no mixer required! Bake as is for a sweet and salty nutty treat or decorate with a fudgy layer of chocolate.
Ingredients
- 1/2 cup (4 ounces or 8 tablespoons) unsalted butter
- 1/2 cup creamy processed peanut butter (not natural)
- 1 cup packed brown sugar (soft and moist, not dry and crumbly)
- 1 large egg, room temperature
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1/2 teaspoon baking powder
- 1/4 teaspoon table salt
- 1/2 cup Reese's Pieces candy, chocolate chips (semisweet, white, or peanut butter), or chopped peanuts
Optional Chocolate Glaze
- 4 ounces semisweet chocolate, chopped
- 1/4 cup Reese's Pieces candy or chopped peanuts
Instructions
- Preheat oven to 350F. Line an 8x8 square with parchment paper.
- In a large saucepan, melt the butter and peanut butter.
- Remove from the heat and whisk in sugar, egg, and vanilla.
- Switch to a rubber spatula and stir in the flour, baking powder, and salt. Once a dough forms, stir in desired mix-ins.
- Spread into the pan. Bake 25-28 minutes or until the edges pull away from the sides, the center no longer looks wet (it may wiggle slightly), and a toothpick comes out with only a few crumbs (no wet batter). Cool completely.
Store in an airtight container at room temperature for up to 5 days.
Optional Chocolate Glaze
- Add about an inch of water to a pan and bring to a simmer. Turn off the heat and place a heatproof bowl over top. Add the chopped chocolate and melt until smooth.
- Spread the melted chocolate in a thin layer on top of the blondies. Top with candy or nuts. Let the chocolate harden before cutting into squares.
Notes
- Enjoyed this recipe? Check out Banana Blondies and Gingerbread Blondies.
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Yeaaaah! PB and anything is a hit here :-)
Umm, I think I’m correct in calling these the most perfect blondies EVAR.
Well, make anything with peanut butter and you are calling my name. They look amazing!
I have a seeeeeerious weakness for Reese’s pieces AND blondies so these are definitely happening in my life soon. YUM!
I want, I want, I want one of these blondies right now. Your incredible photography makes your fabulous recipes even better.
Love simple recipes that turn people into fanatics. And thanks for sharing my layer bars!
Want. Just simply want!
Carla,
Looks so simple and perfect for year-round snacking. Great idea, and lovely photos.
Thank you.
I don’t normally like blondies, but OMG those look so good! Like, dangerously good:) You cannot go wrong with the combination of chocolate and peanut butter. I think I gain weight every time I stop by your blog!
These are AMAZING. Simply perfect!
Ah! Cuteness overload!!!!! :)
I do love this peanut butter version! I actually prefer blondes. And I can’t resist anything with Reeses Pieces!
These look SUPER peanut buttery!!!! Love em!
Chocolate and peanut butter, combined in a chewy blondie ? No wonder every one wants the recipe! I am so happy you shared the recipe!
Oh yum, these look amazing!
YUM…. I will be making these bars very soon :)
marilyn from Iowa !
Carla!!! OMG, LOVE! I will be making these soon!
I’m excited because I have all of these ingredients in my pantry, meaning I can whip these up tonight for an instant PB/Reese’s fix (do I have a PB problem? Probably – but I don’t care!). These blondies look awesome, Carla. I love how simple this recipe is too – it’s always those that are simple that are the best, in my opinion.
Yum!!! I am definitely making these this weekend for Father’s Day!! Any idea how long they keep fresh in a Tupperware container? I may have to make them a couple days in advance…
I would say up to a week in a container.
These look absolutely amazing! I’ve pinned this recipe and also included it in a chocolate peanut butter recipe roundup over on our blog today! Yummmmy! :)
~Emily
Thanks for including me!
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Was going to make these after the kit kat brownie cheesecake recipe but I’m gonna knock these out the ballpark tonight! Wish me luck. No crunch for time so I’ll be following exact recipe.
Omg…these look amazing. Snowing here soon so I’m gonna take some time to give this a try.