M&M Cupcakes with Peanut Butter Frosting

Peanut Butter M&M Cupcakes

The Story:
“She likes Peanut Butter M&M’s.”
Well the peanut butter ones are HUGE, so I didn’t want to throw those into the batter. But a cupcake sprinkled with mini M&M’s with a peanut butter frosting gives the same effect. These were just adorable too! So bright and perfect for any kids party or birthday. [end-story]

M&M Cupcakes with Peanut Butter Frosting

Yield: 20-24 cupcakes

M&M Cupcakes with Peanut Butter Frosting


M&M Cake:
1 box white or yellow cake mix
3 eggs
1/3 C. oil
1 C. milk or buttermilk
1/2 C. sour cream or plain yogurt
1 Tbsp. vanilla extract
1 C. mini M&M's
Peanut Butter Frosting:
1/2 C. smooth peanut butter
1/2 C. butter, softened
2 tsp. vanilla extract
3-4 C. powdered sugar
2-4 Tbsp. milk
Extra M&M's to decorate


1. Preheat oven to 350 degrees and line pans with cupcake liners.
2. Sift cake mix into a small bowl and set aside.
3. In a large bowl, combine eggs, oil, milk, sour cream and vanilla extract.
4. Stir in cake mix until smooth.
5. Fold in M&M's. Don't overmix because the coloring from the candies will dye the cake.
6. Fill cupcake liners 3/4 full and bake for 17-22 minutes or until an inserted knife comes out clean.
7. Peanut Butter Frosting: Beat peanut butter and butter until smooth. Add vanilla extract and slowly add powdered sugar. The frosting will become chunky. With the mixer on low add milk 1 Tbsp at a time until the frosting becomes "fluffy" and smooth. Add more powdered sugar if needed or more milk.
8. Pipe onto cooled cupcakes an top with extra candies.

Peanut Butter M&M Cupcake

M&M Cupcakes

48 thoughts on “M&M Cupcakes with Peanut Butter Frosting

  1. 1

    You are so right, Lizzy… those cuppy cakes are bright, festive, and OH SO adorable! Personally, I’m such a fan of peanut butter M&M’s that I’d probably try to toss them into the batter anyway… and then proceed to pick them out and pop them into my mouth 😉

  2. 2
    Edwina Bustamante says:

    I just received your cookbook, Your Cup Of Cake..I love love LOVE it! Every recipe is easy and looks sinfully delicious. I’m looking forward to trying many of these recipes. Thank you for inspiring my cupcakiness! Edwina

  3. 3
    Patti says:

    I totally made this last month for my son’s 10th birthday…almost identical, only his cupcake had a chocolate peanutbutter swirl frosting….amazing!

  4. 4
    Emilie says:

    I just got your book last week! I am so excited totry the rainbow cupcakes. And the orange white chocolate and the raspberry. Or I could just try them all

  5. 5
    Teresa says:

    These are SO DARN CUTE!! I might have to make them for MY birthday party!! Thank you for the GREAT ideas!!!

  6. 6
    Jana says:

    I LOVE peanut butter M&M’s too…these cupcakes are so calling my name right now! I just may make them for my son’s birthday party this weekend…that will give me an excuse to try them!:)

  7. 7
    Heather says:

    Mmmmm. Now I want to make something with peanut butter frosting.

  8. 8

    These look sooo delicious! I can’t wait to make them!

  9. 9
    Suzy Freeman says:

    I received your cookbook last week and made th German chocolate cupcakes! Everyone in the office LOVED them! I’ve been dubbed the “cupcake girl”! Thank you Lizzy!!!! I have already been asked to make the Fruit Loops cupcakes for my boss’s grandson’s Easter party next week…can’t wait to get baking this weekend!!!

  10. 10
    Tieghan says:

    YUMM! These sound awesome! Peanut butter + cupcakes +M&Ms!!

  11. 11
    Karyl says:

    Saw this recipe yesterday, and made these today! They were heavenly! Thanks for all the awesome recipes..I love your site!

  12. 12
    Colleen says:

    I love your site and recipes, and refer everyone I can to your site. I am wondering where you got these liners? Blue is my favorite, but a bit hard to find in greaseproof.

  13. 13
    Stefanie says:

    I just made these cupcakes today. They are soooo good. I will most likely to use peanut butter frosting for everything. Haha! Thanks for the recipe, you’re awesome!

  14. 14

    Super idea. I’ve set up a new Pinterest Board – M&Ms – and this is my first addition to it!

  15. 15
    Marcia Parker says:

    How does the finished cake differ from just using a box mix without the added ingredients?

  16. 16
    Natalie says:

    Hey I want to make the peanut butter frosting but i dont want to make as much as you did .Can u put the list of ingredients and how much of each ingredient for frosting 24 cupcakes?

  17. 17
    Heather M. Last - Whipple says:

    can we make these usung the regular M&M’s i don’t think M&M’s makes the mini
    M&M’s anymore.

    • 17.1

      Oh of course! They don’t make the mini M&Ms anymore? Really? I just buy mine in the smaller bags, not the giant ones.

      • Heather M. Last - Whipple says:

        Here is what i got as a reply from the M&M’s company.
        Because we are reviewing our marketing strategy, this product is unavailable at this time. Your comments will be shared with our Marketing Staff.
        The product cannot be purchased via the Internet nor directly from us.
        The Baking Bits will be available for the Chirstmas Holiday only.

        Have a great day!
        so, i have been looking around at the stores in my area and i can’t find the mini M&M”s
        so I will be using the regular ones for this recipe. and try and look for them in my area
        at christmas time.

    • 17.2
      Chris says:

      I found mini M&M’s at Wal-Mart today. If you hurry, you may still find some.

  18. 18

    This was SUPER yummy! I just made the frosting and spread it over a chocolate cake!!! Yummy, Yummy!!!!

  19. 19
    Carson says:

    I L0VE YOUR RECIPE! Thank you so much

  20. 20
  21. 21
    Basia says:

    What does it mean “C.” ? (for example – 1/2 C. smooth peanut butter) I’m from Poland and I don’t understand your abbreviation of the word 🙂

  22. 22
    Jalia.Mitchum says:

    Hey Lizzy Early, I’m doing a home cupcake wars with my dad and i’m not really sure of what cupcake to do! You got any advice for Lizzy, for a fantastic cupcake thay will for sure knock him out the box. Reply before this friday i need some advice.

  23. 23
    alyce says:

    Hey Lizzy!

    I love all your recipes that I try, especially the triple threat! They were awesome! Just a quick question: could you crush up the m and ms and put some in the frosting?


  24. 24
    sara says:

    I made these for work and my coworker said this was the best cupcake she has ever eaten!!! 🙂 give this one a try!!! they are soooooo good!!! mad props to the person to come up with this recipe!! i used the buttermilk instead of regular and plain yogurt instead of sour cream ! 🙂 just fyi 😀 keeping this for my yellow cake recipe!!

  25. 25
    Hannah says:

    This peanut butter frosting is terrific! It tastes like a reeses pieces! I put it on a devil’s food cupcake with brownie pieces on top. So, so awesome, everyone is still raving about them a week later! I’m going to have to pull a Julie and Julia, Lizzie and Hannah style and make all of your recipes! The more I try they just get better and better!
    Keep up the good work! I’m looking forward to trying more!

  26. 26
    esther Mcfarly says:

    HI, Im 89 years old and i want to make something for my husbands 96 birthday, Any suggestions? Thank You Esther.

  27. 27
    Tanya Wilson says:

    I can’t wait to make these! I could so live on your website. Thanks for all the wonderful recipes and tips. I made the Nutter Butter Banana cupcakes around Valentine’s Day and they were FABULOUS! It was actually the first tip I was able to make the frosting look like a bakery made them thanks to your youtube videos. AWESOME!

  28. 28
    Teresa says:

    I am making these for a friends birthday but she does not like peanut butter and is very picky about frosting. Any ideas?

  29. 29
    Mary says:

    Dying to make this recipe for my grand kids. It will be better than the confetti one at the store. Question: the M&Ms are heavy. Should I dredge them in flour prior to adding to the cake mixture?

  30. 30
    Michelle says:

    I made 5 dozen of these cupcakes for my son’s school and my work. Everyone loved loved loved these cupcakes! I”m not a huge peanut butter and chocolate fan, but these were yummy! Made me think of Reese’s Pieces. I will be saving this recipe. Thank you so much for sharing. You have a winner here!

  31. 31
    Kristin says:

    Could I make this with chocolate cake mix? Have you ever done that? Thanks!

Speak Your Mind


Never miss a recipe! Sign-up for email updates!