Keto Buttercream Frosting – Vanilla, Chocolate, and more!

This keto buttercream frosting is creamy, delicious, and easy to make.  Not to mention, it’s so versatile — you can make chocolate, vanilla, lemon, peppermint, or any flavor you like!  Keto frosting is the perfect topping for low-carb cakes, cupcakes, and muffins.  If you’ve been looking for a low-carb buttercream frosting without powdered sugar, keep reading.  This frosting is sugar-free and keto-friendly.  

keto chocolate buttercream frosting on a low-carb cupcake

Keto-Friendly Buttercream Frosting

If you’re looking for a delicious buttercream frosting that’s still sugar-free and low-carb, you’ve found the right recipe.  This keto buttercream is creamy and smooth, with just the right amount of sweetness.  

It’s an indulgent way to put the finishing touch on all of your keto baking recipes.  And a spoonful by itself is just like a buttercream fat bomb, am I right?

You can use it on all sorts of recipes, like Vanilla Keto Cupcakes, Keto Chocolate Cupcakes, or in between chocolate cookies to make Keto Oreo Cookies.

vanilla buttercream frosting on a low-carb cupcake

Ingredients in Keto Buttercream

You may have noticed that traditional frosting recipes are pretty much the opposite of keto-friendly.  The main ingredient is sugar!

Luckily, it’s not too hard to make keto-friendly buttercream — all you need are the right ingredients. This particular buttercream recipe is made with butter, flavorings, and a low-carb swap for normal powdered sugar.  

You can use whichever low-carb sweetener you like — as long as it’s powdered.  I prefer to use powdered erythritol sweetener in this recipe — and choose Swerve Confectioner’s brand because it is so convenient.

If the sweetener you have is not powdered, you can blitz it in a completely dry blender until it becomes powdered.


If you are making vanilla buttercream, why not splurge on the good stuff!  You absolutely can’t beat the flavor of Nielsen-Massey Pure Vanilla Bean Paste.  I love the classic rich vanilla bean taste.  Plus, I love that the paste contains real vanilla bean flecks.  1 teaspoon of paste is the equivalent of 1 tsp of extract, so you can use it in all your baking recipes.

Cocoa Powder

You can also flavor this buttercream with cocoa powder.  Your chocolate buttercream will be richer and more flavor all if you skip the low-fat supermarket variety cocoa powders in favor of a higher-fat, upgraded version like this one.  So good!  It’s Barry Callebaut brand packaged by Gerbs, so know it’s going to be delicious.

Other Extracts

Just like you’d use vanilla paste or extract, you can use any other flavor of extract to customize this keto frosting.  Maple frosting would go great with this keto pumpkin bread.  A lot of people like lemon frosting on gingerbread.  And why not banana frosting to amp up the flavor on keto banana bread?


chocolate low-carb frosting on cupcakes

How to Make Keto Buttercream

The process for making keto buttercream couldn’t be simpler, but you will need an electric mixer for the best results.  You can use a stand mixer, but a handheld mixer works well too.

Start by beating the room temperature butter and powdered sweetener together until the mixture is fluffy. This will be easy to do, as long as you make sure the butter is at room temperature first. Then, beat in the vanilla extract — or whatever other flavorings you choose to use.

Finally, beat in some heavy cream to thin out the frosting to a creamy consistency. You can adjust the consistency to your liking.  If you are using it to stack a layered cake, you may want a bit firmer than for frosting cupcakes, for instance.

creamy vanilla icing on keto cupcakes

Flavor Variations for Keto Buttercream

Like we talked about before, the sky is the limit when it comes to flavoring your keto frosting.  Let your creativity run wild — and don’t forget to leave a comment telling me about your combinations!

How to Store Keto Buttercream

You can store keto frosting in the refrigerator for up to five days, as long as you store it very tightly covered.  Let it come to room temperature before using it.  And you may want to whip it again to make sure it’s still fluffy.

Likewise, you can also freeze it.  Let it thaw in the fridge, and them come up to room temperature on the counter before using it.

Keto Buttercream Frosting - Vanilla and Chocolate

Keto Buttercream Frosting - Vanilla and Chocolate

Yield: 6 servings
Prep Time: 10 minutes
Total Time: 10 minutes

This keto buttercream frosting is easy, delicious, and perfect topping for low-carb cakes, cupcakes, and muffins.  If you've want a low-carb buttercream frosting without powdered sugar, try this keto frosting that is sugar-free and keto-friendly.  


Vanilla Buttercream

  • 1/2 cup unsalted butter, room temperature
  • 1/2 cup powdered sweetener, like Swerve confectioner's
  • 1-2 tbsp heavy cream
  • 1 teaspoon Vanilla Extract (or other extracts)
  • pinch of salt

Chocolate Buttercream

  • 1/2 cup unsalted butter, room temperature
  • 1/2 cup powdered sweetener, like Swerve confectioner's
  • 3 tbsp cocoa powder
  • 2-3 tbsp heavy cream
  • 1 teaspoon Vanilla Extract
  • pinch of salt


  1. Add the room temperature butter and sweetener (and cocoa powder, if using) to a large bowl. Mix on low speed for a minute to combine, and then increase the speed to medium and mix for 3 minutes until light and fluffy.
  2. Add the heavy cream, vanilla, and salt. And mix for another 1-2 minutes.
  3. Adjust the consistency with either more heavy cream to thin, or more powdered sugar to thicken.


  • Room temperature ingredients are important to the success of this recipe.
  • Other flavoring extracts may be stronger or weaker than vanilla extract. For example, peppermint is very strong, so you will want to use less. Start with 1/4 tsp, and you can always add more.

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Nutrition Information:
Yield: 6 Serving Size: 1
Amount Per Serving: Calories: 367Total Fat: 38gSaturated Fat: 24gTrans Fat: 0gUnsaturated Fat: 12gCholesterol: 104mgSodium: 54mgCarbohydrates: 6gFiber: 1gSugar: 4gProtein: 1g

The nutrition information shown is an estimate provided by an online nutrition calculator. Carb count will vary with different ingredients and brands. It should not be considered as a substitute for a professional nutritionist’s advice.

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easy keto frosting with 7 flavor options


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