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You are here: Home / Desserts / Bars & Brownies / Peanut Butter Brownies

Peanut Butter Brownies

September 2, 2019 By Sam 23 Comments

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Peanut butter brownies on marble surface

These Peanut Butter Brownies are made with swirls of fudgy chocolate brownie and soft, chewy, peanut butter blondies. Make sure to load them up with plenty of chocolate peanut butter candy pieces!

Peanut butter fans who enjoyed my fudgy, easy brownie recipe are going to love this one !

Peanut butter brownie square on marble board surrounded by candy pieces

Peanut Butter Brownies

Officially in the third trimester this week and I am hungry all. the. time.

I mean, I’ve always been up for eating, and my sweet tooth has always been pretty demanding, but things are getting a little out of control here. I made two pans of these peanut butter brownies last week and am embarrassed to tell you how much I devoured on my own. It’s not safe to keep sweets in the house anymore, especially not peanut butter and chocolate ones like these peanut butter brownies (also not safe: this Buckeye recipe!).

Portioning out peanut butter blondie and brownie batter into glass pan

These peanut butter brownies were originally shared on the blog a few years ago but desperately needed a photo refresh.

They’re a peanut butter & chocolate lover’s dream, chewy and chocolatey, fudgy brownies rippled with creamy peanut butter blondies, packed with mini chocolate chips and Reese’s Pieces. They pretty much melt in your mouth and oh my goodness I’m almost drooling here.

Glass pan with peanut butter brownies (topped with Reese's Pieces candy)

How to Make Peanut Butter Brownies

  1. Make your brownie batter first. This can all be made in a single bowl, and letting the batter sit while you prepare your peanut butter layer helps encourage shiny, crackly brownie tops (which we all love).
  2. Prepare your peanut butter layer! I recommend using an electric mixer as you’ll need to cream together the butter and sugar. This batter gets a bit stiff until you add the milk (at the very end), but don’t worry, everything will come together.
  3. Dollop away! Peanut butter, chocolate, peanut butter, chocolate. Alternate dropping spoonfuls of brownie batter and peanut butter batter into a 13×9 pan. It’ll start out looking like a patchwork quilt, then use your knife to swirl everything together. You want to have some peanut butter and some chocolate in every bite.

All in all you will need three bowls total to make these peanut butter brownies, but the dishes are worth it.

Freshly cut squares of warm peanut butter brownies on marble board

Ok, I think that’s all for today because if I write another word about peanut butter brownies I’m going to find myself up to my elbows in batter in a few minutes and then regretfully googling the effects of excessive peanut butter and chocolate consumption on unborn children.

Enjoy (and Happy Labor Day!)!

More Peanut Butter & Chocolate Recipes You Might Like:

  • Peanut Butter Pie
  • No-Bake Cookies
  • Peanut Butter Blossoms
  • Dirty Brownies
  • Homemade Peanut Butter Cups

Let’s bake together! Follow me on my YouTube channel where I’ve already uploaded over 150 recipe videos that you can watch for free!

peanut butter brownies on marble surface

Peanut Butter Brownies

These Peanut Butter Brownies are made with swirls of fudgy chocolate brownie and soft, chewy, peanut butter blondies. Make sure to load them up with plenty of chocolate peanut butter candy pieces!
5 from 5 votes
Print Pin Rate
Course: brownies, Dessert
Cuisine: American
Keyword: peanut butter and chocolate brownies, peanut butter brownies
Prep Time: 40 minutes
Cook Time: 40 minutes
Total Time: 1 hour 20 minutes
Servings: 24 squares
Calories: 297kcal
Author: Sam Merritt

Ingredients

BROWNIE BATTER

  • 3/4 cup unsalted butter cut into Tablespoon-sized pieces 170g
  • 1/2 cup semisweet chocolate chips 90g
  • 1/2 cup natural cocoa powder 50g
  • 1/2 cup granulated sugar 100g
  • 1 cup light brown sugar firmly packed (200g)
  • 2 large eggs + 1 egg yolk room temperature preferred
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon salt
  • 1 cup all-purpose flour 125g
  • 1/3 cup mini chocolate chips (85g)

PEANUT BUTTER BATTER

  • 1/2 cup unsalted butter softened (113g)
  • 1/2 cup creamy peanut butter 140g
  • 1/2 cup granulated sugar 100g
  • 1/2 cup light brown sugar firmly packed (100g)
  • 1 large egg
  • 1 teaspoon vanilla extract
  • 1 1/3 cups all-purpose flour 167g
  • 1/2 teaspoon cornstarch
  • 1/4 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1 Tablespoon milk
  • 2/3 cup Reeses pieces optional

Instructions

  • Preheat oven to 350F (175C) and prepare a 9x13 glass baking dish¹ by spraying with baking spray. Prepare Brownie batter first:

BROWNIE BATTER

  • In a large, microwave-safe bowl, combine butter and ½ cup semisweet chocolate chips. Heat in 20-second increments (stirring well in betweeuntil chocolate and butter are melted and mixture is smooth.
  • Add cocoa powder and sugars and stir well.
  • Stir in eggs, egg yolk, vanilla extract, and salt.
  • Add flour and stir well. Stir in mini chocolate chips, if using. Set aside while you prepare peanut butter blondie batter.

Peanut Butter Blondies

  • Using an electric mixer or stand mixer, cream together butter, peanut butter, and sugars until creamy and well-combined.
  • Add egg and vanilla extract and stir well.
  • In a separate, medium-sized bowl, whisk together flour, cornstarch, baking powder, and salt.
  • Gradually add flour mixture to peanut butter mixture and stir until well. Add milk and stir until ingredients are completely combined.
  • Use a spoon or spatula to stir in Reese’s pieces candy pieces, if using.
  • Alternate dropping heaping spoonfuls of brownie batter and peanut butter blondie batter into your prepared pan. Use a knife to swirl and make sure the batter is evenly distributed. Top with additional candy pieces, if desired.
  • Transfer to 350F (175C) and bake for 35-40 minutes or until a toothpick inserted in the center comes out clean or with a few moist crumbs (no wet batter).
  • Allow brownies to cool in pan before slicing and serving.

Notes

¹You may use a metal pan instead, just keep in mind that the peanut butter brownies may cook faster so start checking them sooner than the 35 minutes recommended in the recipe.

Nutrition

Serving: 1g | Calories: 297kcal | Carbohydrates: 37g | Protein: 4g | Fat: 16g | Saturated Fat: 8g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Cholesterol: 56mg | Sodium: 139mg | Potassium: 84mg | Fiber: 1g | Sugar: 26g | Vitamin A: 46IU | Calcium: 5mg | Iron: 6mg
Tried this recipe?Mention @SugarSpun_Sam or tag #sugarspunrun!

This peanut butter brownie recipe was originally published on the blog 07/29/2016. Photos and recipe updated and a video has been added 09/02/2019. See original photo below.

peanut butter brownie squares on wood board

Filed Under: Bars & Brownies, Desserts Tagged With: brownies, chocolate, peanut butter

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Comments

  1. JoAnn says

    January 8, 2020 at 2:37 pm

    I have made these peanut butter brownies at least five times—I absolutely love them!! I don’t understand though why you don’t call them brookies–because they are brownies and cookies 🙂

    Just as a tip, I use a dark brownie mix and mix according to the package, they come out awesome. I do this because it is a little easier and I prefer a darker brownie.

    Reply
    • Sam says

      January 8, 2020 at 5:59 pm

      They definitely could be considered a brookie! I’m glad you enjoyed the recipe, thank you for sharing your tip, JoAnn! 🙂

      Reply
  2. Tina says

    December 9, 2019 at 8:37 pm

    5 stars
    When I panned up the drops of chocolate brownie mix and PB mix, I over swirled and it doesn’t quite look as pretty as yours, BUT they are super yummy. Winner for sure!

    Reply
    • Sugar Spun Run says

      December 9, 2019 at 9:46 pm

      I have found that often the best of desserts are not the prettiest. lol. I am so glad that you enjoyed the peanut butter brownies, Tina! Thanks for commenting. 🙂

      Reply
  3. Larry D Akins says

    October 26, 2019 at 8:39 pm

    5 stars
    I tried this peanut butter and chocolate Brownies recipe tonight and I just love them . Thank you for sharing your recipe I will be making them again

    Reply
    • Sugar Spun Run says

      October 27, 2019 at 6:34 am

      Thank you so much, Larry! I am so glad that you enjoyed the Peanut Butter Brownies. Thanks for your comment. I hope that you try more of my recipes soon. 🙂

      Reply
  4. Sarah says

    September 24, 2019 at 9:09 am

    5 stars
    Excellent recipe-the large group I made two batches for absolutely loved it. Followed directions as stated. Mmmmmmmm!

    Reply
    • Sugar Spun Run says

      September 24, 2019 at 9:42 am

      Thank you so much, Sarah! I am so happy that you enjoyed the Peanut Butter Brownies. 🙂

      Reply
  5. Jessica says

    September 2, 2019 at 5:08 pm

    5 stars
    Thank you for posting this being I’m also in my third trimester and these look amazingly yummy. Congratulations

    Reply
    • Sam says

      September 2, 2019 at 5:32 pm

      Thank you so much! Good luck to you the rest of the way! 🙂

      Reply
  6. Renay says

    September 2, 2019 at 12:11 pm

    Eating sweets makes for a sweet baby! At least that is what I told myself…lol! Congratulations on your new addition!

    Reply
    • Sam says

      September 2, 2019 at 1:06 pm

      Thank you so much, Renay! We are excited! 🙂

      Reply
  7. melody spears / ania rahaman says

    February 6, 2017 at 6:44 am

    5 stars
    i wish i could have all the recipes downloaded.
    cause it is very hard to look for the recipes i wanna try out and a lot of time gets wasted browsing

    Reply
    • B says

      September 28, 2019 at 10:12 pm

      I bookmark them or add them to my favorites.

      Reply
  8. plasterer bristol says

    October 4, 2016 at 1:40 pm

    Boy do these sound good. Can’t wait to make these, thanks for sharing this recipe.

    Simon

    Reply
  9. Alaina @ A Not So Quiet Kitchen says

    August 2, 2016 at 9:22 pm

    I haven’t had a brownie in WAY too long! These look so delicious! And I have all the ingredients, I think I may do some baking tonight! 🙂

    Reply
  10. Karly says

    August 1, 2016 at 4:45 pm

    Sweet tooth is officially in full force after seeing these little numbers. I love the PB and you’ve got just the right amount of chocolate swirl… perfection!

    Reply
    • Sam says

      August 2, 2016 at 3:26 pm

      Thank you, Karly! 🙂

      Reply
  11. Medha @ Whisk & Shout says

    July 29, 2016 at 9:23 pm

    Peanut butter brownies are a classic and yours look epic! Love that pb blondie layer 🙂

    Reply
    • Sam says

      July 29, 2016 at 10:27 pm

      Thank you, Medha!
      🙂

      Reply
  12. pat says

    July 29, 2016 at 1:24 pm

    Hi Sam
    Do you think this will work with all natural peanut butter?
    Organic, no salt, no sugar. It is all I have been using for 7 years. I love it and can no longer stand to even lick the knife from Joe’s regular stuff.
    I hate peanut butter cups because of this.
    I am thinking I would probably need some minor adjustments.
    thanks, big hug, Pat

    Reply
    • Sam says

      July 29, 2016 at 10:36 pm

      Hi Pat! Hmmm I wish I had a more definite answer for you, but while I always have a jar of natural peanut butter in my house (I love it as a snack after work with a sliced apple) I basically never bake with it. I am inclined to think that this would be an OK substitution, it would just have a somewhat different taste (which would be fine since that is the taste you prefer) but unfortunately I can’t guarantee it. I’m putting the question out to a group of food bloggers I know to see if anyone has experience baking with it this way, and I will let you know what I hear back. I’m sorry I’m not more certain! <3

      Reply
    • Sam says

      July 30, 2016 at 9:55 am

      OK, so after talking to some people who have baked with natural peanut butter, it sounds like it should be fine except the taste will be less sweet. Since the blondie calls for sugar and it’s combined with the brownie, I think it should still be sweet enough, though. I hope this helps, and if you do get a chance to try it I’d love to hear how it turns out for you! Have a wonderful weekend, Pat! 🙂

      Reply

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The author (Sam) in blue shirt holding donut Hi, I'm Sam! I'm dedicated to bringing you sweet, simple, and from-scratch dessert recipes. My life may or may not be controlled by my sweet tooth. Send help (or chocolate). Read more about me.

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