The Best Peanut Butter Buttercream Frosting for Cake

April 13, 2022

The Best Peanut Butter Buttercream Frosting for Cake

I LOVE peanut butter. I could honestly eat it with just about anything. And I am always looking to see what it would taste good with! So, you can imagine how happy I was when I created such a delicious and smooth peanut butter buttercream for my cakes. And, you guys, I can honestly say this is the best peanut butter buttercream frosting for cake! 

This post shares my infamous peanut butter buttercream frosting recipe along with some of my favorite cakes where I use the buttercream for them. I hope you find some favorites and enjoy baking and eating your new peanut butter cake creations!

the best peanut butter buttercream frosting for cake.

The Best Peanut Butter Buttercream Frosting Recipe

I’m in love with my peanut butter buttercream frosting recipe. I think it is so light and silky smooth, which makes the perfect addition to a cake! If you love peanut butter too, I think you’ll really love this buttercream recipe! 

To make the peanut butter buttercream frosting, you’ll need:

  • 5 cups (625 g) powdered sugar, measured then sifted
  • 1 ½ cups (339 g) unsalted butter slightly chilled
  • 1 cup (250 g) peanut butter smooth
  • ¼ cup (57.75 g) heavy whipping cream
  • 1 Tbsp (13 g) vanilla extract
  • Pinch of salt

First, beat the butter and the peanut butter for about 3 to 5 minutes in a stand mixer with a paddle attachment. You want it to lighten in color and be smooth in texture. 

Next, gradually add the sifted powdered sugar, followed by the vanilla, salt, and cream while your mixer is on low speed. Stir all of the ingredients to combine.

Lastly, beat your mixture for an additional 5 minutes with your mixer on medium-high speed. Scrape the sides and bottom of the bowl a couple of times during the process to make sure it all gets mixed together well. The buttercream will become lighter in color and should take on a fluffy texture. 

Top 3 Peanut Butter Buttercream Frosted Cakes

As promised, here are three of my favorite peanut butter buttercream frosted cakes you’ll love! After making this list I think it’s time for me to go whip one of these up in the kitchen. The only problem is deciding which one to do first! 

Peanut Butter Buttercream Frosted Cake #1: Peanut Butter and Marshmallow Filled Fluffernutter Cake

fluffernutter cake recipe.

My Fluffernutter Cake is made up of tender and fluffy white cake layers with banana cream filling and toasted marshmallow filling, covered in peanut butter buttercream. Did you grow up on fluffernutter sandwiches like me and my family? It’s a sandwich with peanut butter and marshmallow fluff! How could you go wrong? And my mom would always add a layer of banana in there too. So this cake is a representation of those cherished sandwiches I had as a kid!

Peanut Butter Buttercream Frosted Cake #2: Peanut Butter Dream Cake

peanut butter cake covered in the creamiest peanut butter buttercream.

My Peanut Butter Dream Cake is the ultimate peanut butter lover’s cake. It has peanut butter cake layers, peanut butter marshmallow filling, and peanut butter buttercream frosting. (Yes, I love peanut butter that much.) I made this cake for one of my birthdays and it did not disappoint! I think if you love peanut butter or even just like it, this cake will put a huge smile on your face! 

Peanut Butter Buttercream Frosted Cake #3: Peanut Butter Oreo Cake

peanut butter oreo cake recipe.

Is it just me or do peanut butter and oreo really belong together? Dipping oreos in peanut butter has always been a thing in my house, so it was only a matter of time before I turned this sweet snack into a cake! This Peanut Butter Oreo Cake has SIX layers! I just wanted to make sure you got to taste the cake, cream filling, and buttercream in every bite. But you don’t have to do six. Check out my original post here to see how you can condense it down. 

The Best Peanut Butter Buttercream Frosting for Cake

Alright, which one of these cakes is getting you most excited to use the best peanut butter buttercream frosting for cake? I can’t wait to see which ones you love the most! And I’d love to know what you think of the peanut butter buttercream. Come let me know over on Instagram! You can follow me @cakebycourtney where I share all the tips and tricks for baking cakes and more!

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Join the Conversation

  1. Would you use food coloring with this frosting? Or make the outside plain frosting if you use the peanut butter frosting just between the layers?

    1. you can do whatever you want!

  2. I am a cookier, but Courtney makes it so easy for me to love cake and buttercream recipes! Step by step and so many helpful tips! My family loved this buttercream recipe paired with her Chocolate PB cake!

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