Fluffy Peanut Butter Frosting

HELLO GORGEOUS. The countdown to baking season is on and over the next few weeks, I’ll be sharing the most delicious homemade frosting recipes that are perfect for all of your baking adventures.

Let’s kick it off with the most incredible, insanely fluffy peanut butter frosting that comes from my famous Damn Good Peanut Butter Banana Cake. It’s made with just 5 simple ingredients, gets whipped to perfection right in your electric mixer, and is full of wonderful peanut butter flavor.

When I tested the peanut butter banana cake years ago I literally couldn’t stop dipping fruit, pretzels, and crackers in the frosting leftovers. It’s truly perfect for cakes, cookies, brownies, and of course, by the spoonful for a little sweet treat. Whip this up for your bestie’s birthday and watch them do backflips with joy.

Ingredients in the best peanut butter frosting

This easy peanut butter frosting is made with just 5 ingredients and comes together in minutes. The texture is SO fluffy and it tastes perfectly sweet and delicious. Here’s what you’ll need:

Butter: this recipe is essentially a peanut butter buttercream frosting, so the base is (of course) made with butter! See below for an easy vegan and dairy free swap.
Peanut butter: be sure to use a natural, creamy peanut butter that’s made from just peanuts and salt. Use the code ‘AMBITIOUS15‘ to get 15% off of my fav nut butter brand, Wild Friends.
Powdered sugar: this frosting gets its sweetness from powdered sugar! It helps it get nice and fluffy, too.
Vanilla: a little vanilla extract brings the flavors all together. Learn how to make your own vanilla here!
Milk: you’ll likely need to add a couple of tablespoons of milk to make the frosting creamy. No heavy cream necessary! Feel free to use any milk you’d like.

Looking to make it dairy free?

It’s easy! Simply swap the butter for a vegan buttery stick like Earth Balance to make a vegan/dairy free peanut butter frosting.

Can I make it refined sugar free?

Sure! Try using my homemade paleo powdered sugar instead of regular powdered sugar. The paleo version uses coconut sugar instead. Please note that I’ve only tried this frosting using regular powdered sugar, so let me know if the comments if you try the paleo kind.

How to make peanut butter frosting

Whip the base. Start by beating together softened butter and peanut butter on high in the bowl of an electric stand mixer until it’s light and fluffy. Don’t have a stand mixer? Feel free to use a hand mixer!
Add the mix-ins. Slowly beat in the powdered sugar, vanilla, and a little almond milk.
Increase the speed. Beat the frosting together on high for about 2 minutes so that the frosting gets those beautiful peaks. Add another tablespoon of milk if you’d like to make it extra creamy, then enjoy! I recommend using an offset spatula to frost your cakes.

How much frosting does it make?

This recipe will make enough frosting to frost 3 6-inch round cakes or 2 8-inch round cakes. If you’d like to frost an 8×8 or 9×9-inch square cake I recommend halving the recipe.

The key to fluffy frosting

To make this peanut butter frosting reach a super fluffy consistency you’ll want to whip together all of the ingredients slowly and increase the speed of your electric mixer as you go. This will create beautiful peaks in the frosting and make it super easy to frost your favorite treats. Don’t forget to add a little bit of milk at a time as needed, this will also help to make the frosting easier to spread.

Delicious ways to use it

How to store homemade peanut butter frosting

At room temp: this peanut butter frosting will stay good at room temp for about a day on a cake.
In the fridge: feel free to keep the frosting in the fridge for up to a week if you’re looking to prepare it ahead of time. Let the frosting come to room temp before using it. After you’ve frosted your cake or another dessert, I also recommend storing the cake in the fridge after one day.

Freeze it for later

You can freeze this peanut butter frosting for up to 3 months in an airtight container or freezer-friendly bag. When you’re ready to use it, simply let it thaw in the refrigerator, let it come to room temp, and then re-whip it in your electric mixer.

Cake recipes you’ll love

Get all of my cake recipes here!

I hope you love this easy, fluffy peanut butter frosting recipe! If you make it be sure to leave a comment and a rating so I know how you liked it. Enjoy, xo!