Peanut butter cake loaded with chopped Peanut Butter M&M’s and a dreamy peanut butter frosting, this cake is a peanut butter lover dream come true!

I’ve been on a peanut butter kick lately. It all started when I asked my daughter to let me know what she wants me to pack for her for our month-long trip to Italy. “2 princess dresses, a pair of high heels and mommy, don’t forget peanut butter and jelly so we can make sandwiches”.
I smiled, but she’s right. We have such a hard time finding peanut butter when we travel to see my parents in Romania and just to be in the safe side, this time I bought a couple of jars of peanut butter to take with us to Italy. Surrounded by so much peanut butter, (is that ever a bad thing?) I started to crave some peanut butter treats. An open bag of Peanut Butter M&M’S was calling my name from the freezer as well and since I was on the quest to pretty much clean out the fridge and freezer before out long trip, I just had to use those Peanut Butter M&M’S. Just had to!

When it comes to layer cakes, my husband and I have totally different opinions. He says frosting is the best part, I say cake is the best part. Without a good cake base to even out the sweetness of the frosting, you don’t have a good cake. Am I right or am I right?
Of course, no matter how ah-mazing is the cake, if the frosting is blah, I’ll pass the dessert.
Good thing this Peanut Butter M&M’S cake with peanut butter frosting is so delicious we decided we were both right, at least until I make another layer cake.
To make this cake it takes a little bit of planning. I know it’s not exactly my easy peasy cake recipe you’re expecting, but don’t leave before you hear me out.
I’ve made this cake using Greek yogurt the 1st time and although it was good, it did not blow me away. There was a slight tanginess from the yogurt and did not please me completely.
The second time I used vanilla yogurt and the cake was too soft and crumbly.
The third time, I let the yogurt drain in the fridge for a couple of hours before adding it to the cake batter. Perfection!

What takes the cake to the next level are the chopped Peanut Butter M&M’S. The Peanut Butter M&M’S are a little bigger than milk chocolate M&M’S and obviously heavier. Add them to the cake batter straight from the bag and they will all sink. Chop them roughly and you have colorful dots throughout the entire cake. Don’t you think they make the cake even more irresistible?
The frosting is dreamy!
Creamy peanut butter is mixed with soft butter and smooth and slowly powdered sugar is added until it becomes fluffy. Since I wanted a really fluffy frosting, once all the sugar has been added, I fitted my mixer with the whisk, added some heavy cream and whisked the frosting for a couple of minutes. Air is fast incorporated, making the frosting so light and fluffy.
Because the frosting is so light, you need to assemble the cake in a cake ring and refrigerate for a couple of hours before removing the ring. If you do not have an adjustable cake ring, assemble it without one, but to do whip the frosting.

For the finishing touches, you can use more Peanut Butter M&M’S either chopped or left whole or a mix of Peanut M&M’S and Peanut Butter M&M’S.
Which ones are you favorite?
If you’re looking for more ideas using M&M’S candy in your recipes, follow along the newly launched Pinterest page https://www.pinterest.com/mmschocolate/ for daily inspiration!
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Disclosure – this post is sponsored by M&M’S. Although I’ve been compensated to develop the recipe and write this post, the opinions expressed here are all mine. Thank you for supporting brands I love.






frosting as thick as the cake layers? you should be ashamed of yourself! and by that, i mean that this cake looks amazing and all future cakes should be frosted as such. 🙂
I just started a new job and as a “get to know you” question, someone asked me my favorite candy. I said I couldn’t decide between peanut butter or peanut m&ms! Love them both! This cake would be perfect for me. Yummy!
Peanut M&Ms are my favorite. This cake is oh my goodness. I am with you that the cake is the best part.
Holy moly! That is one epic cake!
Love the thick layers of peanut butter frosting! This cake looks incredible!
This is one of the coolest cakes I have ever seen! Pinned!
Was curious if you used vanilla greek yogurt? Could I use it?…. can’t wait to make this cake this week for my sons birthday! He loves peanut butter and is obsessed with PB M&M’s…. He will love this Cake! Thank you for sharing!
Hi Stacy,
first, happy birthday to your son! Sounds like he’ll have a fantastic day with a slice of this cake!
And yes, you can use vanilla greek yogurt, but just like regular yogurt, strain it to make sure you don’t add too much liquid to the cake batter. Better safe than sorry 🙂
Please come back and let me know how your son enjoyed it
Roxana