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    Home » Recipes » Bars & Brownies

    Dirty Brownies — Peanut Butter Cup Oreo Brownies

    Updated: Jul 28, 2019 • Published: Jun 15, 2017 by Sam Merritt • 41 Comments

    This post may contain affiliate links. As an Amazon Associate I earn from qualifying purchases. Please read my disclosure policy.
    Jump to Recipe Jump to Video
    Dirty Brownies

    Chewy, chocolaty brownies layered with Reese’s peanut butter cups and loaded with crushed Oreos, these “Dirty Brownies” are utterly irresistible and 100% not bikini-friendly!  

    Be sure to check out the quick, easy how-to video just before the recipe!

    Dirty Brownies -- Chewy, chocolaty brownies layered with Reese's peanut butter cups and loaded with crushed Oreos || Sugar Spun Run

    I am totally aware that the official start of summer is merely days away.  I recognize that “swimsuit season” is very much here and now.

    I get it, healthy recipes are pretty popular right now, they’re monopolizing prime real estate on Pinterest and maybe you’re restricting your diet to things made with quinoa or kale, or labeled “skinny” this or that.

    This is not one of those recipes.

    If you’re spending your mornings and evenings sweating over a treadmill with your bikini dangling in front of you like a carrot, you should probably click away right now, because what I’m about to share is 100% not bathing suit friendly.

    Today I have “Dirty Brownies” for you, the most diabolical of all brownies, loaded with Oreo cookie pieces, positively stuffed with peanut butter cups, and determined to make you suddenly shockingly accepting of the thought of wearing a mumu to the beach.

    Dirty Brownies -- Chewy, chocolaty brownies layered with Reese's peanut butter cups and loaded with crushed Oreos || Sugar Spun Run

    These brownies are irresistible, so much so that they almost didn’t even make it onto the blog.

    Not because of any defect or shortcoming on their part (I mean, just look at them), but because I am a glutton of the highest degree with an embarrassing and indomitable lack of self-control.

    I “sampled” a corner and suddenly half the pan was gone, with not a single photograph taken.  I held myself back from polishing off the pan just long enough to snap a few shots, and then I called my sister and begged her to come pick them up (she obliged) because I couldn’t trust myself around them any longer.

    Peanut butter cup stuffed oreo brownies
    Original photo from 2015

    These brownies are dirty, they’re seductive, sinister, and completely untrustworthy.  They’re worth every last calorie of chewy, exceedingly chocolaty brownie, stuffed with mines of milk chocolate peanut butter cups, blasted full of cookie bits, shiny, crackly tops littered with cookie pieces.  They’re a dream come true, a flavor explosion, a confectionery firework.

    And they are your swimsuit’s #1 enemy right now.

    But do you care?

    Stacked dirty brownie bars

    Peanut Butter Oreo Brownies (Dirty Brownies)

    Chewy, chocolaty brownies layered with Reese’s peanut butter cups and loaded with crushed Oreos, these “Dirty Brownies” are utterly irresistible!
    4.91 from 11 votes
    Print Pin Rate
    Prevent your screen from going dark
    Course: brownies, Dessert
    Cuisine: American
    Prep Time: 15 minutes minutes
    Cook Time: 40 minutes minutes
    Total Time: 55 minutes minutes
    Servings: 16 slices
    Calories: 345kcal
    Author: Sam Merritt

    Ingredients

    • 12 Tbsp (170 g) butter cut into Tbsp-sized pieces, 1 ½ sticks
    • ¾ cup (75 g) cocoa powder
    • 1 ⅔ cup (335 g) granulated sugar
    • 1 Tablespoon water
    • 1 teaspoon vanilla extract
    • 2 large eggs + 1 egg yolk lightly beaten
    • 1 ⅓ cup (170 g) all-purpose flour
    • ½ teaspoon baking powder
    • ½ teaspoon salt
    • 15 Oreo Cookies divided
    • 16 Peanut Butter Cups

    Instructions

    • Preheat oven to 350F (175C) and lightly grease/spray a 9x9 pan.
    • In a large, microwave-safe bowl microwave your butter until melted.
      12 Tbsp (170 g) butter
    • Stir in cocoa powder and sugar.
      ¾ cup (75 g) cocoa powder, 1 ⅔ cup (335 g) granulated sugar
    • Stir in water and vanilla extract.
      1 Tablespoon water, 1 teaspoon vanilla extract
    • Add eggs and egg yolk, stirring until combined..
      2 large eggs + 1 egg yolk
    • In a separate bowl, combine flour, baking powder and salt.
      1 ⅓ cup (170 g) all-purpose flour, ½ teaspoon baking powder, ½ teaspoon salt
    • Gradually add to butter mixture until completely combined.
    • Break/crush 12 Oreo Cookies (do not completely grind into fine crumbs, I placed them in a Ziploc bag and smacked them with a rolling pin until they were broken into pieces) and fold into the batter.
      15 Oreo Cookies
    • Layer about half of the brownie mixture into the bottom of your prepared pan. Evenly spread peanut butter cups over the batter, gently pushing down so they are snug.
      16 Peanut Butter Cups
    • Spread the remaining half of the batter on top.
    • Crush your remaining Oreos and sprinkle over the top of the batter.
    • Bake at 350F (175C) for 35-40 minutes (the toothpick test is difficult to do here due to the peanut butter cups -- the best way to tell that these are done is to look for set centers that have firmed and the center should feel somewhat set and not liquidy to your fingertips).
    • Allow to cool before serving.

    Nutrition

    Serving: 1slice | Calories: 345kcal | Carbohydrates: 49g | Protein: 4g | Fat: 17g | Saturated Fat: 8g | Cholesterol: 24mg | Sodium: 263mg | Potassium: 170mg | Fiber: 3g | Sugar: 34g | Vitamin A: 276IU | Calcium: 30mg | Iron: 2mg

    Nutritional information is based on third-party calculations and should be considered an estimate only. Actual nutritional content will vary based upon brands used, measuring methods, cooking method, portion sizes, and more.

    Tried this recipe? Show me on Instagram!Mention @SugarSpun_Sam or tag #sugarspunrun!

    Pin It & Follow me on Pinterest!

    Dirty Brownies

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    Recipe originally published 12/30/2015, photos & text updated 6/15/17

    Dirty Brownies -- Stuffed with peanut butter cups and oreo cookie pieces www.SugarSpunRun.com

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    Reader Interactions

    Comments

    1. cakespy

      June 18, 2017 at 12:51 pm

      If this is dirty, I never wanna be clean. SO DELICIOUS LOOKING.

      Reply
      • Sam

        June 19, 2017 at 10:21 pm

        Haha! Thank you!

        Reply
    2. Katherine

      June 17, 2017 at 5:39 pm

      Holy cow, these look amazing!

      Reply
      • Sam

        June 19, 2017 at 10:22 pm

        Thank you, Katherine!

        Reply
    3. Hira

      June 15, 2017 at 6:38 pm

      Ok, wow, I told myself that starting today I would get ready for swimsuit season. Haha. Well, that can wait because these brownies look absolutely delicious! Brownies are my #1 weakness… 😂!

      Reply
    4. Nickie

      April 15, 2017 at 7:21 am

      OK I know it wont be as good as yours, but could you use box brownie mix to save alittle time??

      Reply
      • Sam

        April 20, 2017 at 11:15 am

        Haven’t tried it that way myself, but I suspect that would be totally fine!

        Reply
    5. Bre

      April 12, 2017 at 10:35 am

      Can baking soda be substituted for the baking powder?

      Reply
      • Sam

        April 20, 2017 at 11:18 am

        I would not recommend it.

        Reply
        • Bre

          April 23, 2017 at 12:41 pm

          Thank you! Making these today, we’ll see how it goes! 😀

    6. regina Medford

      November 27, 2016 at 3:04 pm

      This is sex in a pan! Sinful!I love em ! I dont normally eat things mixed together or compilations of different foods touching , but here is the exception….slap yo mama good!

      Reply
    7. Centoria Green

      October 09, 2016 at 7:22 pm

      Hello! These look amazing and I want to make but is 16C of sugar correct?

      Reply
      • Sam

        October 09, 2016 at 7:30 pm

        Hi! It’s only 1 2/3 cup sugar, but I did see that my recipe was saying “16 Cups Peanut Butter” when really it was supposed to say “16 Peanut Butter Cups”. I just updated my recipe plugin and it must’ve gotten mixed up there in the switch, it’s just supposed to be 16 Reese’s Peanut Butter cups. I hope that helps! 🙂

        Reply
    8. Jennifer

      October 01, 2016 at 1:39 pm

      I’m planning to make these later today. However after reading your description, I feel that the serving size is off. :-).

      Reply
      • Sam

        October 02, 2016 at 3:58 pm

        Haha, in my house it’s about 2 servings 😉

        Reply
    9. Jenn

      July 25, 2016 at 10:45 am

      5 stars
      I saw these and immediately knew I had to make them. Going out to buy the ingredients today so I can make them for a super delicious and yummy dessert tonight! So glad I stumbled across this recipe!

      Reply
      • Sam

        July 25, 2016 at 10:45 am

        Awesome! I hope you love them, Jenn! 🙂

        Reply
    10. Lyn

      June 21, 2016 at 5:33 pm

      I hate to sound stupid, but what size peanut butter cups?

      Reply
      • Sam

        June 21, 2016 at 5:36 pm

        Not a stupid question! They’re just standard Reese’s peanut butter cups, like the kind you’d get in the check out aisle of the grocery store. I hope you love them, Lyn!

        Reply
    11. Melissa Klotz

      January 05, 2016 at 1:05 pm

      Oh man. Reese’s + Oreos were my favorite childhood sweets. These look so incredible!!! I just posted a recipe for Oreo White Chocolate cookies and couldn’t stop eating them… These brownies are going to give them a run for their money!! 😮

      Reply
      • Sam

        January 07, 2016 at 11:05 am

        Those cookies sound amazing, Melissa! Thank you! 🙂

        Reply
    12. Summer

      January 04, 2016 at 10:45 am

      I am in love with this recipe! These brownies look so inviting and mouth- watering ♥

      summerdaisy.net

      Reply
      • Sam

        January 07, 2016 at 11:08 am

        Thanks so much, Summer! 🙂

        Reply
    13. Beeta @ Mon Petit Four

      January 02, 2016 at 2:29 am

      Ooohhh these look SO good, Sam! These would make anyone lose self-control so don’t feel bad! I mean hellooo, brownies filled with peanut butter cups and oreos….YES PLEASE!! I think you deserve extra Christmas presents for the fact that these even made it onto the blog <3

      Reply
      • Sam

        January 07, 2016 at 11:09 am

        YES! Haha, thanks so much, Beeta! 🙂

        Reply
    14. Marsha | Marsha's Baking Addiction

      December 31, 2015 at 3:41 am

      Oh my, these brownies look so good! Peanut Butter Cup and Oreo stuffed brownies – yes please!

      Reply
      • Sam

        January 07, 2016 at 11:09 am

        They were SOOO good! Thank you, Marsha! 🙂

        Reply
        • Carla

          April 10, 2016 at 2:05 pm

          I’m trying to make them now and the 2nd step says to stir in oil but doesn’t say how much….help!

        • Sam

          April 10, 2016 at 3:02 pm

          Oh no! I’m sorry, Carla, there isn’t supposed to be any oil, it’s just butter. It looks like I accidentally left that in from an earlier draft. I’m so sorry about that, it’s been fixed in the recipe!

        • Huskyboo

          May 25, 2017 at 1:15 pm

          5 stars
          Unsalted or salted butter?

        • Sam

          May 25, 2017 at 2:18 pm

          Unsalted 🙂

    15. Amanda

      December 30, 2015 at 4:13 pm

      I can’t start thinking about kale with these beautiful brownies right in front of me! I thought I was done with mass amounts of sweets, but one look at these and I’m craving something chocolate-y again! These sound wonderful. I love peanut butter cups, so these are really my kind of brownies.

      Reply
      • Sam

        January 07, 2016 at 11:10 am

        Haha, they are certainly tempting! Thank you, Amanda! 🙂

        Reply
    Newer Comments »
    4.91 from 11 votes (7 ratings without comment)

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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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