Skip to Content

Keto Vanilla Buttercream Frosting

This smooth and creamy keto vanilla buttercream frosting is the perfect easy-to-make topping for any low carb cake!

Living a low carb lifestyle, but struggling to find a delicious frosting that tastes indulgent, but doesn’t put you over your macros?

You’ll definitely want to give this recipe a try!

This frosting would go great with my keto cake recipes. Be sure to check out:

Vanilla Pound Cake

Coconut Flour Cupcakes

Chocolate Cupcakes

Also, if you’re just wanting to buy keto-friendly frosting…good news, it’s out there! Check out Good Dee’s baking mixes and frosting. The woman who owns this business is fantastic!

What ingredients do I need to make this frosting?

Butter— I use salted butter in just about every recipe. I prefer it, but you can definitely use unsalted and add salt to taste after mixing the ingredients.

Sweetener— My favorite way to make this recipe is to use powdered allulose. Allulose is newer on the keto scene, but it’s quickly gaining popularity because it tastes just like regular sugar, but doesn’t have a glycemic impact. Just like with erythritol and monk fruit, I deduct the “non-impact” carbs of allulose from the total carb count of a recipe and the fiber to get net carbs.

Also, if you can’t find powdered allulose like me, you can just use a spice grinder or coffee grinder to get the desired powder. Powder is important for this recipe, though, because otherwise you’ll end up with grainy frosting.

(Note: I’ve also made this recipe with powdered erythritol. It comes out fine, but it definitely has a cooling aftertaste.)

Heavy Cream— This helps to make the frosting super creamy. I’ve also used Half and Half as a substitute.

Vanilla Extract–It is vanilla buttercream after all 🙂

Nutrition Info

This keto vanilla buttercream frosting recipe should make enough to cover about 10 cupcakes. To calculate nutrition, I just took the totals for each ingredient I used and divided it by 10 for one serving.

Calories: 92 Calories
Total Carbs (including sweetener): 24.14g
Fiber: 0g
Sweetener: 24g
Net Carbs: 0.14g
Protein: .16g
Fat: 10.4g

And here’s a breakdown based on the ingredients that I used:

Yield: 10 Servings

Keto Vanilla Buttercream

Keto Vanilla Buttercream

This smooth and creamy keto vanilla buttercream frosting is the perfect easy-to-make topping for any low carb cake!

Prep Time 5 minutes
Total Time 5 minutes


  • 1/2 Cup Butter, Softened
  • 2 Cups Powdered Allulose
  • 2 Tbsp Heavy Whipping Cream
  • 1 Tsp Vanilla Extract


  1. In a large mixing bowl, using a hand mixer or stand mixer, beat softened butter for two minutes until creamy.
  2. Add Powdered Allulose, Vanilla and Heavy Whipping Cream. Beat on high for an additional three minutes until frosting texture is achieved.

Nutrition Information:


10 Servings

Serving Size:

1/10th of Mixture

Amount Per Serving: Calories: 92.6Total Fat: 10.4gCarbohydrates: 24.14gNet Carbohydrates: .14gFiber: 0gSugar Alcohols: 24gProtein: .16g

three chocolate cupcakes frosted with vanilla frosting sitting on a white plate
Keto Chocolate Cupcakes
Easy Keto Chocolate Chip Cookies

This site uses Akismet to reduce spam. Learn how your comment data is processed.


Friday 26th of March 2021

This was very grainy. I followed the recipe exactly.

LyLy Christian

Saturday 30th of January 2021

I tried to make it with monkfruit sweetener and it did not work,but i mixed it with homemade whipped cream and it was delishus


Saturday 5th of December 2020

I used 1 cup of powdered Swerve instead and it turned out great!

Nikki Isakson

Wednesday 7th of October 2020

I only have Swerve and I don't like things overly sweet. Is there something I can add to cut the sweet taste or should I just use less swerve? Thanks!


Wednesday 7th of October 2020

I would just start adding the Swerve in slowly. Mix and taste until you get to your preferred sweetness. Also, make sure you're using powdered Swerve, otherwise the frosting will end up very grainy. If you only have granular Swerve, you can pop it into a coffee grinder to powder it quickly. Hope it turns out delicious!

Melissa Fromm

Thursday 23rd of July 2020

The texture was perfect but way too sweet. I used powdered serve. It was all I had


Friday 11th of September 2020

Well, the problem is you substituted Swerve for the Allulose. Allulose is 70% as sweet as sugar, Swerve is slightly sweeter than sugar. Try using the Allulose.


Tuesday 25th of August 2020

It's icing, made of mostly sugar, it supposed to be would it be anything but sweet?

This site uses Akismet to reduce spam. Learn how your comment data is processed.