Peanut Butter M&M Brownies

I needed a bit of color in my life yesterday. Things were boring and I wanted to spice them up.

I did what any sane person would do and dumped a large bag of peanut butter m&ms in my brownies. It was kind of a brilliant idea, if I do say so myself.

I’m usually more of a box mix brownie kind of girl, but I thought I’d be all Susy Homemaker-y and bake my brownies from scratch. I used the same recipe I always use when I feel Susy Homemakery-ish and want delicious, homemade brownies. They are thick, fudgy, and kind of outrageous.

They get even more crazy when you add in the colorful m&ms. You could use plain, peanut, or pretzel m&ms in place of the peanut butter ones, but…um…why would you want to do that? Chocolate and peanut butter, man. It doesn’t get better than that.

I didn’t bake the little girl in this last photo myself, but I did take the photo and since she fits right in with the theme of this blog (super sweet and hard to resist) I had to share:

It’s okay to feel like reaching through your screen to pinch those chubby little cheeks. I’ve been struggling with that myself. (Thank you to her mama for letting me share her sweetness with all of you!)

Apparently it’s PB m&m day today! Check out Shelly’s fab recipe for Peanut Butter M&M Chex Bars. No oven required!

Peanut Butter M&M Brownies

Rating: 51

Prep Time: 10 minutes

Cook Time: 30 minutes

Total Time: 40 minutes

Yield: 24 brownies

Peanut Butter M&M Brownies


  • 1 cup (2 sticks) butter
  • 2 1/4 cups sugar
  • 4 large eggs
  • 1 1/4 cups cocoa powder
  • 1 teaspoon salt
  • 1 teaspoon baking powder
  • 1 teaspoon espresso powder, optional
  • 1 tablespoon vanilla extract
  • 1 1/2 cups all-purpose flour
  • 3 cups peanut butter M&Ms


  1. Pre-heat the oven to 350 degrees. Butter a 9×13 baking dish.
  2. In small saucepan over low heat, melt butter completely. Stir in sugar and continue cooking for 1-2 minutes, stirring constantly. Do not allow sugar mixture to boil.
  3. Pour butter mixture into a large bowl or stand mixer, beat in cocoa powder, eggs, salt, baking powder, espresso powder, and vanilla extract. Mix until well combined.
  4. Stir in the flour and M&Ms until well combined.
  5. Pour into prepared pan and bake for about 30 minutes, until a tester comes out mostly clean. The edges should be set and the center should still look slightly moist, but not uncooked. Cool on a wire rack.


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28 Responses to “Peanut Butter M&M Brownies”

  1. Erin July 21, 2011 @ 10:20 am (#

    Peanut butter anythings are my favorite way to add a little extra to brownies, cookies, cake, etc… Yay peanut butter!


  2. Blog is the New Black July 21, 2011 @ 10:22 am (#

    Wow, I could use some of these!


  3. Yammie @ Yammie's Noshery July 21, 2011 @ 10:44 am (#

    The brownies look to die for.

    The baby is beautiful! Such a full head of hair! :]


  4. Cristina July 21, 2011 @ 12:24 pm (#

    YUMMY these look awesome! I’ll definitely be adding these to my “to make SOON list!”


  5. Aimee July 21, 2011 @ 12:25 pm (#

    Yum. I could use that brownie in my life right now.


  6. Homegrown beanes July 21, 2011 @ 1:29 pm (#

    They look unbelievable!


  7. DessertForTwo July 21, 2011 @ 12:32 pm (#

    I think Mr. Dessert For Two is tired of tasting all my weird dessert creations. I really think all he wants is a good ol’ brownie with some colorful tasty stuff stirred in. I just might make these for him. Depends on how good he is today or not…

    Thanks for sharing :)


  8. Melanie Flinn July 21, 2011 @ 12:53 pm (#

    YUM. My hubby adores PB and brownies- he would love me forever if I made him these. I wouldn’t mind eating them either. 😉


  9. d.liff @ yelleBELLYboo July 21, 2011 @ 1:23 pm (#

    This gives me a great idea. I want to try making brownies with Cadbury Eggs in them. I tried it with cookies ( and it was amazing, I can only imagine how the brownies would turn out. Your base sounds good, I might use it!

    Great post – adorable baby and the brownies are so cute with the M&Ms


  10. alex July 21, 2011 @ 1:41 pm (#

    peanut butter M&Ms are my favorite! wish I had some of your brownies right now!


  11. Averie @ Love Veggies and Yoga July 21, 2011 @ 1:48 pm (#

    These do look thick, fudgy, and outrageous…and with PB M & M’s…WOW!

    And your photography…both the brownies and the baby….just beautiful! :)


  12. Jessica July 21, 2011 @ 6:26 pm (#

    Oh YUM! I love me a good, fudgy brownie and these look wonderful!


  13. Joanne July 21, 2011 @ 7:57 pm (#

    PB M+M’s are my favorite kind. And you and Shelly are SO not helping my addiction any!


  14. Barbara July 22, 2011 @ 5:38 am (#

    Those are about the darkest brownies I have ever seen, Karly! Love espresso with my chocolate too! Fun to use pb M&M’s.


  15. Liz (Little Bitty Bakes) July 23, 2011 @ 8:35 am (#

    Oh my goodness – these look SO fudgy! Yum yum yum :)


  16. Libby September 6, 2011 @ 6:22 pm (#

    Just made these brownies with my cousin. We are so excited to try them. Thanks for posting this recipe. :)


  17. Beth Michelle September 16, 2011 @ 3:26 pm (#

    Too delicious. The brownies and that precious baby :)


  18. Irishbaker September 16, 2011 @ 4:24 pm (#

    These look unbelievably rich,such a dark colour!


  19. Da'dra March 9, 2013 @ 6:52 am (#

    It was too salty and bitter for our taste, but my kids were happy I made some. And, in the ingredient list it doesn’t mention chocolate chips, but in the directions it says to add them. That was confusing. But, it was very close to what I was looking for.


    • Elizabeth replied: — June 23rd, 2014 @ 9:26 pm

      Thanks Da’dra.


  20. Hard candies October 21, 2014 @ 12:43 am (#

    Good post. I’m facing many of these issues
    as well..


  21. Leigh May 19, 2015 @ 8:35 am (#

    Hi there! Totally looking forward to making these! Assuming in the instructions mean to reference peanut butter M&Ms instead of chocolate chips, right? Or maybe there’s an option for both…


    • Karly replied: — May 19th, 2015 @ 9:29 pm

      Whoops! Yes, I meant m&m’s, but chocolate chips are good too!


      • Leigh replied: — May 20th, 2015 @ 10:59 am

        Okay, made ’em last night. Used Dutch process cocoa. OUTSTANDING!!! Thank you very much, I’ve had rotten luck with brownies from scratch, but these were seriously awesome!!



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