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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


  • ½ Cup Butter, Softened
  • 2 Cups Powdered Allulose
  • 2 tablespoon Heavy Whipping Cream
  • 1 teaspoon 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

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david jennings

Saturday 30th of April 2022

I have not read anyone else's comment, and I doubt that you will be happy with mine. Yesterday, I made a flourless chocolate cake, and decided to frost it with vanilla cream - your recipe. I ordered allulose from Anthony's. I made the frosting, following your instructions (although it did seem that 2 cups of allulose was extreme). It was grainy, but tasted all right. The cake was not at all sweet, having used only two teaspoons of Stevia. I did not use the entire recipe to frost an 8" square cake. It was very difficult to spread - very thick - and grainy. In spite of that, my first impression was that the combination reminded me of an Oreo cookie. My husband didn't like either the cake or the frosting, so I ate the rest of his portion. Then, because I am a goumand, I had another 2" by 4" portion. All fine.

Until about three hours later, when I had one of the most severe cases of diarrhea that I have ever experienced. After there was nothing left but water, I continued to cramp and expel colored liquid. I was badly bloated in upper and lower abdomen, and I have had no appetite at all today.

I am disappointed that neither you nor Anthony's have any information about possible side effects of allulose. It borders on irresponsibility. You could at least have warned about the possible gastric side effects. It is inexplicable that you either did not know of the possibility of such severe side effects, or did not care what might happen to those of us looking for substitutes for sugars and for recipes which will allow us - with no side effects - to indulge in desserts.

Shame on you for this lapse. I found the information - which I should have found on your recipe - after the fact, while I was in distress, on the Internet. There is no indication on your recipe, nor on Anthony's packaging that one should expect this kind of reaction.

David Pittman-Jennings Professor Emeritus Crane School of Music SUNY Potsdam


Saturday 8th of January 2022

Perhaps this a misread on my part, I'm seeing 14 grams, or is it .14 grams??


Saturday 8th of January 2022

While this is titled KETO ICING, I think 24g of Carbs seems high, granted Sugar is 0g. (Alcohol Sugar). As much as I would like to try I'm in question on how this fits KETO.


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

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