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    Home » Bars » Brownies

    Peanut Butter Brownies

    By Elizabeth Waterson // Jun 13, 2020 (Updated Sep 10, 2024) // 12 Comments

    Jump to Recipe·4 from 1 review
    This post may contain affiliate links, which may pay me a small commission for my referral at no extra cost to you! Thank you for supporting Confessions of a Baking Queen!

    190 shares
    peanut butter brownie pieces stacked on top of each other on a white surface

    Peanut Butter Brownies start with a fudgy brownie recipe that is filled with a layer of peanut butter in the middle then more peanut butter swirled on top. Your peanut butter friends will love this brownie recipe! Step-by-step photos help you make these pb brownies!

    peanut butter brownie pieces stacked on top of each other on a white surface

    I don't know about you but I go through phases with peanut butter some years I cannot get enough peanut butter. This is one of those years, from my chocolate peanut butter breakfast shake, to my apple slices with peanut butter, to chicken satay with peanut sauce, I cannot stop! One thing I never get sick of is chocolate and peanut butter together.

    I made these peanut butter brownies because as much as I love my peanut butter cup brownies the peanut butter doesn't punch you in the face. Don't get me wrong it's a great recipe but if you're looking for a full-on peanut butter punch these are the brownies you want. It took me a few times to get the recipe just right, but now I love it, and I hope you do too.

    Other peanut butter brownie recipes sometimes call for making a peanut buter filling with powdered sugar, I wanted an easy and quick recipe that was just true to peanut butter so for the filling in these brownies all you need is peanut butter. I do suggest using a non-natural type peanut butter- I love to use Jif and Skippy for baking.

    You will also see there is peanut butter not only on top of the brownie but also inside.

    peanut butter brownies on a wire rack

    Let's get to the recipe

    Jump to:
    • Ingredients
    • Instructions
    • How to freeze
    • Can you double
    • More Brownie Recipes
    • Recipe Card
    • Recipe Ratings & Comments

    Ingredients

    Here are the ingredients you'll need for the recipe.

    • Water. Good old water, tap is fine!
    • Unsalted Butter. Just a little of butter is used for flavor, we then use oil for the rest of the fat.
    • Granulated Sugar. We're going to cook the sugar so it melts and provides that glorious crinkly brownie top.
    • Cocoa Powder. I prefer the flavor of Dutch-process cocoa, I use Bensdorp Dutch Cocoa Powder.
    • Vegetable Oil. Oil provides so much moisture to the brownies.
    • Vanilla Extract. Use the real stuff, no imitation here!
    • Eggs. We'll use one whole egg and one egg yolk, the extra yolk provides richness and chew to the brownies.
    • Baking Powder. Just a little helps give the brownies a little lift.
    • Salt. Don't skip it, trust me!
    • Cornstarch. Also known as cornflour this ingredient helps tenderize the brownies and give them a softer texture.
    • Flour. Just good old all-purpose or plain flour is needed, when you mix the flour in be sure not to overmix!!
    • Creamy Peanut Butter. For baking, I prefer brands like Jif or Skippy and save the natural peanut butter for snacks.

    Adding a handful of semi-sweet or dark chocolate chips would be fabulous too!

    For another nutty dessert check out my almond flour brownies, pistachio cookies or my Reese's smores bars. And lastly my peanut butter and jelly cookies.

    Instructions

    Preheat your oven to 350F/180C and line a 9X9 or 8X8 square pan with foil and grease heavily. The foil overhang will help you easily pull the brownies out of the pan.

    sugar, cocoa powder, water, and butter in a metal pot on a grey surface

    In a large pot add the water, butter, sugar, and cocoa powder.

    melted cocoa powder, sugar, butter mixture

    Cook on low- medium heat for 2-3 minutes, whisking until it is all combined together.

    hand whisking vegetable oil into chocolate mixture in a large pot

    Take off of the heat then add the vegetable oil and vanilla extract.

    Let mixture sit for 5 minutes then add the egg and egg yolk. Whisk to combine.

    egg and egg yolk added to chocolate mixture in a large pot

    Add the baking soda, salt, cornstarch, and mix to combine.

    baking soda, salt, and cornstarch added to brownie batter in a large pot

    Gently add the flour by using a spatula to fold in until just combined. Do not over mix, this will affect the end product.

    brownie batter in a large pot

    Now we are going to take ⅔rds of the batter pour batter into the prepared pan and use an angled spatula to spread it out, scoop 4oz (½ Cup) of the peanut butter on top of the batter and use an angled spatula to gently spread it into one even layer, as best as you can. Pour the remaining brownie batter on top and then place the remaining peanut butter in chunks then use a butter knife to gently swirl up and down then across.

    peanut butter swirled into brownies

    Make sure you do not overmix or you won't have the pretty peanut butter swirl.

    peanut butter swirled into brownies

    Bake 25-35 minutes.

    Everyone's oven is different, for me, the brownies always bake within 29-31 minutes, but I would start checking at 25 minutes for your oven. Don't overbake the brownies. You want a toothpick in the center to come out with moist crumbs, not completely dry. Place the pan on a wire rack to cool completely before cutting.

    Store in an air-tight container on the counter for up to 4 days.

    peanut butter brownies cooling on a wire rack

    How to freeze

    You can totally freeze peanut butter swirled brownies. Let the brownies cool completely then store in a freezer-safe container. Let thaw at room temperature for 30-60 minutes depending on the size of your brownies.

    Ideally brownies shouldn't freeze for longer than 3 months.

    Can you double

    You can easily double the recipe, just bake in 9X13 inch pan I would start checking the brownies at 31 minutes and gauge how much longer- 5 more minutes..etc. You want a toothpick inserted in the center to come out with moist crumbs no wet batter.

    More Brownie Recipes

    • Buckeye Brownies
    • M&M Brownies
    • Peppermint Brownies
    • Rolo Brownies
    • Blonde Brownies
    peanut butter brownies on a grey surface

    ★★★★★ Please let me know if you make this recipe by leaving a star rating and comment below!

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    Recipe Card

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    peanut butter brownie pieces stacked on top of each other on a white surface

    Peanut Butter Brownies

    5 Stars 4 Stars 3 Stars 2 Stars 1 Star

    4 from 1 review

    Print Recipe
    Pin Recipe

    Peanut Butter Brownies start with a thick and chewy brownie recipe that is filled with a layer of peanut butter in the middle then more peanut butter swirled on top. Your peanut butter friends will love this brownie recipe! Step-by-step photos help you make these pb brownies!

    • Total Time: 50 minutes
    • Yield: 16 1x

    Ingredients

    Scale
    • 2oz (¼ Cup) Water
    • 1oz (2 Tbsp) Unsalted Butter
    • 250 Grams(1 ¼ cups) Granulated Sugar
    • 90 Grams (Scant Cup) Bensdorp Dutch Cocoa Powder
    • 3oz (scant ⅓ cup) Vegetable Oil
    • 1 Tablespoon Pure Vanilla Extract
    • 1 Large Egg Yolk and 1 Large Egg, at room temp.
    • ⅛ Teaspoon Baking Powder
    • ½ Teaspoon Salt
    • 1 Tablespoon Cornstarch/ Cornflour
    • 60 Grams (scant ½ cup) All-Purpose/ Plain Flour
    • 6oz (¾ Cup) Creamy Peanut Butter (For baking I prefer brands like Jif or Skippy)

    Instructions

    1. Preheat your oven to 350F/180C and line a 9X9 or 8X8 square pan with foil and grease heavily.
    2. In a large pot add the water, butter, sugar, and cocoa powder. Cook on medium heat for 2-3 minutes until it is all combined together. Take off of the heat and add the oil and vanilla extract. 
    3.  Let the mixture sit for 5 minutes then add the egg and egg yolk. Whisk to combine.
    4. Add the baking powder, salt, cornstarch, and mix to combine. Gently add the flour by using a spatula to fold in until just combined. Do not over mix, this will affect the end product.
    5. Pour ⅔rds of the batter into the pan and use an angled spatula to spread it out, scoop 4oz (½ Cup) of the peanut butter on top of the batter and use an angled spatula to gently spread it into one even layer, as best as you can. Pour the remaining brownie batter on top and then place the remaining peanut butter in chunks then use a butter knife to gently swirl up and down then across, but do not overmix or you won't have the pretty peanut butter swirls.
    6. Bake 25-35 minutes. Everyone's oven is different, for me, the brownies always bake within 29-31 minutes, but I would start checking at 25 minutes for your oven. Don't overbake the brownies. You want a toothpick in the center to come out with moist crumbs, not completely dry. Place the pan on a wire rack to cool completely before cutting.
    7. Store in an air-tight container on the counter for up to 4 days.

    Equipment

    square baking pan

    8 Inch Square Baking Pan

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    OXO Kitchen Scale

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    Notes

    • Doubling the recipe- I have done it a couple of times in a 9X13 inch pan, I can't remember the exact oven time. I would start checking the brownies at 31 minutes and gauge how much longer- 5 more minutes..etc. I will update when I make them double again.
    • Olive Oil- I have made this recipe with olive oil instead of vegetable oil, while not economical I was in a pinch and it worked beautifully!
    • Author: Elizabeth Waterson
    • Prep Time: 15
    • Cook Time: 35
    • Category: Dessert
    • Method: Bake
    • Cuisine: American

    Did you make this recipe?

    Tag @confessionsofabakingqueen on Instagram and hashtag it #cbqbakes

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    Reader Interactions

    Comments

      Leave a comment & rate this recipe Cancel reply

      If you love this recipe, please consider leaving a ⭐ star rating ⭐ when you post a comment. Star ratings help people discover my recipes online. I am incredibly grateful for your support! —xx Liz

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    1. Ann says

      September 28, 2020 at 6:43 am

      Hi Elizabeth,

      I was just wondering why the peanut butter dries out and becomes crumbly, While the brownie part is still fudgy and moist.

      Reply
      • Elizabeth Waterson says

        September 28, 2020 at 12:25 pm

        Hi Ann, the type of peanut butter can effect it drying out also the peanut butter will dry out quicker than the brownies since peanut butter is much drier to begin with. I personally have not had a problem with dry, crumbly peanut butter. I usually use JIF peanut butter and the brownies are gone in my house by day 2-3. Let me know if I can help with anything else. XX Liz

        Reply
    2. Maria Zubair says

      February 14, 2021 at 10:42 pm

      I have made it. they were good but i burnt mine. I will try again.

      Reply
      • Elizabeth Waterson says

        February 15, 2021 at 11:02 am

        Hi Maria, so sad to hear you burnt yours, every oven is different so I do suggest you check ahead of time if your oven runs hot. Goodluck for next time! XX Liz

        Reply
    3. Maria says

      February 15, 2021 at 12:26 am

      I have made it. they were good but i burnt mine. I will try again. Also i dont know when to add chocolate chunks in the brownies

      Reply
      • Elizabeth Waterson says

        February 15, 2021 at 11:03 am

        Hi Maria, sorry for the confusion there shouldn't be any chocolate chunks in this recipe. But if you wanted to add some you could I would add them when you fold the flour in. XX Liz

        Reply
    4. Maria says

      February 15, 2021 at 12:41 am

      I have one more question: can i use the brownie batter for simple brownies?

      Reply
      • Elizabeth Waterson says

        February 15, 2021 at 11:04 am

        Yes you can use it with no peanut butter and just make plain brownies! XX Liz

        Reply
        • Maria says

          March 24, 2021 at 11:35 pm

          Hey Liz

          Used it to cook simple brownies(without peanut butter). The output was so good. Everybody loved it
          Thank you so much

          Reply
          • Elizabeth Waterson says

            March 25, 2021 at 9:07 pm

            Hi Maria, thanks for coming back to review the recipe. So glad you enjoyed the brownies!!! Take care. XX Liz

            Reply
    5. Rachel Hazen says

      March 26, 2025 at 12:32 pm

      Can I use regular cocoa powder? Also if I use chunky peanut butter, will it make a big difference?

      Reply
      • Elizabeth Waterson says

        March 27, 2025 at 6:26 am

        The recipe was formulated with Dutch process which has had the acidity removed which can affect the leavening agents but since thees are brownies and such a small amount of baking powder you should be fine using regular coocoa it will just change the flavor slightly. You can use chunky it shouldn't make that much of a difference! Hope that helps, please report back how you like the brownies! XX Liz

        Reply

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    Hiya! I am Elizabeth Waterson, welcome to my treat-filled site. After spending 15 years in the restaurant industry and growing up baking, I wanted to share my love of baking with you all. My step-by-step tutorials will help you learn how to bake at home. Confessions of a Baking Queen (CBQ) has been featured in CBS LA, HuffPost Taste, BuzzFeed, Taste of Home, and more! Here you will find loads of sweet recipes with a few savory ones for good measure. Feel free to message me with any questions! Happy Baking! 

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