Low Carb Chocolate Buttercream Frosting Recipe, Keto Friendly

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Low Carb Chocolate Buttercream Frosting, Keto Friendly, from Spinach Tiger #chocolate #frosting #keto #lowcarb #recipe

This is the most delicious low carb chocolate buttercream frosting, and  I mean it. Served at my last dinner party celebrating a birthday, everyone (even the kids) loved this smooth, creamy, sugar free frosting, made possible by Swerve Confectioner’s Sugar. (amazon)

I know what you will want to know about this frosting is how does it compare to a regular chocolate frosting. I think I like it more. I like that swerve puts out a Confectioner’s baking sugar, which makes it so easy to make a guilt free low carb chocolate frosting.

Normally, I would make a double batch of my grain free chocolate cupcakes, but here I used this Swerve chocolate’s box cake mix. It’s only one layer, so I used two. One layer was vanilla and one layer was chocolate. Swerve sent me the cake mixes, but this is not a paid or sponsored post. They asked nothing in return.

Low Carb Chocolate Buttercream Frosting, Keto Friendly, from Spinach Tiger #chocolate #frosting #keto #lowcarb #recipe

I just happen to be one of the bloggers that makes a lot of Swerve desserts and I tag them on instagram. I suggest following me on instagram to never miss a recipe,  and if you love sugar free desserts (that are low carb), give them a follow too.

I hope to get several more of the mixes and come up with some awesome box cake hacks. I am a firm believer of making my own frosting, because it’s so easy, and I like to make frosting according to my own sweet tooth.

This is the frosting that will make any cake or cupcake a sugar free dessert without compromise.

Low Carb Chocolate Buttercream Frosting from Spinach Tiger

Tips for low carb chocolate buttercream frosting

Make sure the butter and cream cheese are both softened and the powdered sugar and cocoa powder are sifted. These two tips should make it all come out nice and smooth.

Taste your low carb chocolate buttercream frosting

Taste your low carb chocolate frosting. You might like a little more chocolate fudge taste. You can feel free to have a dark unsweetened cocoa to the mix for more of a chocolate fudge frosting. I now use this cacao and only need a half cup. It makes a wonderful rich frosting.

You will only use 1 1/2  cup of Swerve’s Confectioner’s sugar as opposed to 3 to 5 cups of regular confectioner’s sugar. Do not try to substitute cup for cup. It will not work and will be cloyingly sweet. I recommend 1 to 1 1/2 cups per every 3 cups of regular confectioner’s sugar at the most.

What is the best Unsweetened Cocoa for low carb chocolate buttercream frosting?

After many revisions to this recipe, I am now using Better Body Foods Cacao. It’s rich and is giving me the taste I’ve been looking for without mixing cocoas. Whatever you use, please TASTE. You may need more of your unsweetened cocoa.

Low Carb Chocolate Buttercream Frosting, Keto Friendly from Spinach Tiger

This low carb chocolate frosting recipe keto friendly. 1/10 serving is 2 net carbs and about 200 calories.

This can be frozen. Take out and allow to sit until softened.

Low Carb Chocolate Cupcakes

This cupcake recipe makes an awesome one layer cake. Double for a spectacular Layer Cake or double for a triple layer naked cake.

These mini bundt cakes  also keto might be the very best chocolate recipe I’ve made so far!

These Keto Chocolate Cupcakes will be featured as small cakes in my keto home bakery, coming soon.

You may also love this low carb cream cheese frosting.

Keto Recipes
Keto Chocolate Frosting
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4.84 from 12 votes

Low Carb Chocolate Cream Frosting

Delicious sugar free Low Carb chocolate buttercream frosting made with Swerve Confectioner’s Sugar (a powdered erythritol).
Prep Time10 minutes
Cook Time10 minutes
Total Time20 minutes
Course: Low Carb Dessert
Cuisine: American
Servings: 10
Author: Angela Roberts


  • 1 cup unsalted butter softened
  • 4 tablespoons cream cheese softened or mascarpone
  • 1 1/2 cup Swerve Confectioner’s Sugar
  • 1/2 cup Unsweetened Cocoa I use Better Body Cacao
  • 1/4 teaspoon sea salt or more according to taste
  • 1/4 to 1/3 cup heavy cream see notes
  • 1 teaspoon vanilla extract


  • Mix butter and cream cheese together until smooth.
  • Sift confectioner’s sugar, and unsweetened cocoa
  • Add both to butter mixture. Add salt.
  • Add vanilla. Mix well.
  • Add in up to 1/3 cup heavy cream.
  • You may not need it all, depending on consistency you want.
  • Keep in refrigerator until ready to use.
  • Allow to come to room temperature before applying.
  • Will frost one double layer cake or triple layer mini cake. Frosting layers will not be as high as other frostings, but will be enough.


This will frost a layer cake or 12 cupcakes. When using a Swerve or Powdered erythritol as a sugar substitute. A half recipe will frost a one-layer cake.
Please taste your frosting as all unsweetened cocoa is different. 
Instead of adding in heavy cream, you can also add in a little boiling water if frosting needs thinned down for piping. Add only a tablespoon at a time. 


Serving: 1g | Carbohydrates: 4g | Fiber: 2g

Please follow me on instagram. If you make this recipe,  please tag me #spinachtiger.

If you love this recipe, please give it five stars. It means a lot. xoxo

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  1. 5 stars
    Made this for my husband, he is very picky. He ate at least 1 piece a day u til it was gone. So yummy!
    The cake was very moist and filling. The icing doesn’t become gritty. I used lankanto monk and erythritol mixture as my sweetener.

  2. 5 stars
    I made this frosting with a Keto Chocolate cake here:https://jenniferbanz.com/keto-chocolate-cake that I doubled and put in 2 8″ layer cake pans. The frosting was sufficient to lightly ice the 2 layer cake. The only adjustments I made to this recipe was to just use 1/2 C Special Dark Cocoa instead of mixing 1/2 C. regular with 2 T. special dark. I also used Special Dark Cocoa in the cake recipe. It was all sweet enough using confectioners Swerve, but since it was so dark, I wouldn’t recommend eating it too late in the evening or you won’t sleep well =)!!! All in all, excellent and I will use again!!

  3. 5 stars
    Angela is a keto dessert culinary genius! Just made a birthday cake using her suggested Swerve chocolate cake mix PLUS this incredible keto chocolate buttercream recipe. Outstanding! Incredible chocolate taste, deep & rich – with fluffy consistency that spread like a dream. I made 2 6 inch layers and this frosting recipe created PLENTY of coverage. What a decadent chocolate vision! I wish there was a way to include a picture. Anyway, no one could BELIEVE it was a keto cake. No one! It cut into 16 slices. Thank you, Angela, for using your gift to create this sugar-free work of art. πŸ‘…πŸ‘…πŸ‘…

  4. This chocolate frosting recipe – plus your recent new & improved chocolate cake recipe – just trumped any/all other Keto chocolate cake recipes I was planning to try. I trust your recipes more than any others because you work so hard in recipe development AND your taste buds are in a class all by themselves! (ex: I now add a few drops of glycerine to any other sweetener I may be using in a Keto dessert recipe – & wow, what a difference! No more cooling taste.) I will come back with a comment, post baking your latest Keto chocolate cake recipe topped by THIS yummy-looking chocolate frosting. (I predict a 5-tongue rating πŸ˜…)

4.84 from 12 votes (8 ratings without comment)

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