Skinny Peanut Butter Swirl Brownies

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We had such a busy, fun weekend. On Saturday my team and I walked in the Crohn’s walk. It was an absolutely gorgeous day and I had 22 people join me for the 3-mile walk. I so appreciate my friends and family coming out to walk with me (hopefully some of them are reading this). It was a great time and I can’t wait for next year.

On Sunday, we had our first kickball game of the year. We played old vs. young and the young team won this time. Sadly, I am on the old team.

Yesterday I had the day off and since the weather was finally beautiful and not sweltering, I got to bake. This recipe is amazing for so many reasons. First, it has the word “skinny” in the title for a reason. They are actually pretty healthy. They’re full of protein rich peanut butter and oatmeal instead of oil and flour. Second, they taste nothing like a health conscious brownie and more like chocolate peanut butter fudge. They’re gooey and rich and excellent cold with a glass of milk. Finally, you get to use your blender for this recipe. That doesn’t happen often.

Aren’t the swirls gorgeous?
Skinny Peanut Butter Swirl Brownies {Persnickety Plates}


Skinny Peanut Butter Swirl Brownies {Persnickety Plates}

Peanut Butter Swirl Brownies

Melissa Williams | Persnickety Plates
No ratings yet
Prep Time 10 minutes
Cook Time 25 minutes
Course Dessert
Cuisine American
Servings 9 brownies
Calories 263 kcal


  • ¾ cup creamy peanut butter
  • 6 oz. Greek yogurt
  • ¼ cup milk I used 2%, you can use skim, or almond
  • 1 egg
  • ¼ tsp salt
  • 1 tsp baking powder
  • 1 cup sugar
  • ½ cup cocoa powder
  • ½ cup old-fashioned rolled oats not quick oats


  • Preheat the oven to 350 degrees. Spray a 8×8 inch pan with non-stick spray and set aside.
  • Put all of the ingredients, except for the peanut butter, into a blender. Putting the liquid ingredients into the blender first makes blending easier. Blend until the mixture is smooth and oats are ground up.
  • Pour batter into prepared baking dish.
  • Microwave peanut butter for about 30 seconds. Drop melted peanut butter by spoonfuls onto the batter, swirling gently with a knife to create a marbled effect. If you overmix, you'll loose the marbling effect.
  • Bake for 20-25 minutes or until brownies begin to pull away from the sides of the pan (mine took a little longer - more like 30 minutes).
  • Wait until completely cooled before slicing.


Serving: 1gCalories: 263kcalCarbohydrates: 34gProtein: 10gFat: 13gSaturated Fat: 3gCholesterol: 20mgSodium: 182mgPotassium: 327mgFiber: 3gSugar: 25gVitamin A: 37IUCalcium: 73mgIron: 1mg

Nutritional information is an estimate and provided to you as a courtesy. You should calculate the nutritional information with the actual ingredients used in your recipe using your preferred nutrition calculator.

Tried this recipe? Tag me!Mention @melissa_pplates or tag #persnicketyplates!

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Skinny Peanut Butter Swirl Brownies {Persnickety Plates}

Oh! I almost forgot. I have my first giveaway coming up! Stay tuned, it should be next week & I think it’s pretty great. 

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  1. Mrs. Monologues says

    Oh my god, those looks so good. Please mail me some, right now. Seriously, stop reading this comment and send me some brownies….

    I mean it!

  2. E says

    Nice! These sound pretty awesome. I wonder if they’d still turn out with soy milk and just egg whites. If not, real egg it is! Did you use Splenda or sugar? Sugar prob tastes better…

  3. thepinkrachael says

    These look amazing! they make me sad that I don’t have an oven and can’t bake in the first place!

  4. Christine Tisor-Leab says

    Just made these this morning with some yogurt that was getting ready to expire. I wasn’t sure they would turn out because the batter was really runny, BUT…They turned out terrific! Thank you for the recipe. My family loved them!

  5. Roberta says


    These look great. Do we have any of the nutritional information that would be in these?

    Thank you

    • Melissa Williams says

      Thank you for reminding me this very old recipe needs new photos & a refresh! I just updated the nutrition info for now & will work on revising soon.

Melissa Williams/Persnickety Plates is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. For more details, please see my Privacy Policy & Disclosures page.

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