A slice of cake with layers of purple filling and yellow keto royal icing buttercream frosting, next to a piping bag on a white plate.

Best Keto Royal Icing Buttercream Recipe Sugar Free Frosting

Are you looking for a delicious and easy keto dessert recipe that will wow your guests and satisfy your sweet tooth? If so, you’re in luck! Today, I’m going to share with you one of my favorite keto frosting recipes: keto royal icing buttercream.

This keto buttercream frosting is smooth, creamy, and perfect for decorating sugar cookies, cakes, cupcakes, and more. It has a rich vanilla flavor and a beautiful glossy finish. Plus, it’s low-carb, gluten-free, and sugar-free, so you can enjoy it without guilt.

Unlike traditional royal icing, which is made with powdered sugar and egg whites, this keto royal icing buttercream recipe uses swerve, butter, cream, and vanilla extract. 

Swerve is a natural sweetener that tastes and measures like sugar, but has zero calories and carbs. It also doesn’t cause a spike in blood sugar or insulin levels, making it ideal for keto dieters.

Butter adds richness and creaminess to the frosting, while cream helps to thin it out and make it more spreadable. 

Vanilla extract adds a lovely flavor and aroma, but you can also use other extracts like almond, lemon, or peppermint to change it up.

The best part about this keto royal icing buttercream recipe is that it’s super easy to make. You only need five ingredients and a hand mixer or a stand mixer. You can whip it up in less than 10 minutes and use it right away or store it in an airtight container in the fridge for up to a week.

You can also customize this keto buttercream frosting by adding food coloring, sprinkles, or other decorations.

You can use liquid colors or gel colors, but be careful not to add too much water, as it can make the frosting runny.

A delicious slice of keto royal icing buttercream recipe sugar-free frosting on a cake, beautifully garnished with intricate yellow frosting designs, presented on a white plate.
Keto Pound Cake with Keto Royal Icing Buttercream

You can also use natural food coloring like beet juice, turmeric, or spinach to make it more healthy.

To decorate your keto cookies or cakes, you’ll need a piping bag and some piping tips. You can use any tips you like. I recommend using a small round tip for outlining and a larger star or flower tip for filling.

You can also use a spatula or a knife to spread the frosting evenly.

This keto royal icing is perfect for piping!

Here is a keto blueberry creme fraiche pound cake that I decorated with this keto royal icing buttercream. The frosting is smooth, glossy, and stable (don’t mind my piping skills). It has a light and delicious vanilla flavor that complements the cake well.

Ingredients

  • 3 tablespoons swerve
  • 2 large fresh egg whites, at room temperature
  • 1/2 cup unsalted butter, at room temperature
  • 2 tablespoons heavy cream
  • 1/4 teaspoon sugar free vanilla extract
A slice of cake with layers of purple filling and yellow keto royal icing buttercream frosting, next to a piping bag on a white plate.
Low Carb Royal Icing Buttercream

Instructions

In a small bowl, whisk the egg whites and swerve together until well combined. You can also add a drop of lemon juice or citric acid to help stabilize the meringue.

In a large mixing bowl, whisk the butter with an electric mixer. You can use a stand mixer fitted with the paddle attachment until smooth and creamy too.

Add the cream and vanilla extract and whisk again until well incorporated.

Gradually add the egg white mixture to the butter mixture, whisking on low speed until smooth and glossy. You may need to scrape down the sides of the bowl with a spatula as you go.

Transfer the keto royal icing buttercream to a piping bag fitted with your desired tip and decorate your keto cookies or cakes as you like. You can also use a spatula or a knife to spread the frosting evenly.

Enjoy your keto royal icing buttercream or store it in an airtight container in the fridge for up to a week. You can also freeze it for up to 3 months and thaw it in the fridge before using.

A Pinterest pin showcasing a Keto Royal Icing Buttercream recipe that is sugar-free and gluten-free. The image displays a delicious slice of cake topped with yellow buttercream icing, with the recipe title and website URL prominently displayed.
Sugar Free Royal Icing Buttercream Recipe

Keto Dinner Recipes

More Keto Dessert Recipes

I hope you enjoyed this keto royal icing buttercream recipe and found it easy to follow. This keto buttercream frosting is one of the best keto frosting recipes you can find. It is low-carb, gluten-free, sugar-free, and delicious.

It is perfect for decorating keto cookies, cakes, cupcakes, and more. You can customize it with food coloring, sprinkles, or other decorations. It is also easy to make with only five ingredients and a hand mixer or a stand mixer.

If you try this keto royal icing buttercream recipe, please let me know how it turned out in the comments below. I’d love to hear from you and see your creations.

You can also share your photos on Instagram and tag me @coachrallyrus. Don’t forget to check out my other keto recipes and tips on my blog.

Thank you for reading and happy baking!

A slice of cake with layers of purple filling and yellow keto royal icing buttercream frosting, next to a piping bag on a white plate.

Best Keto Royal Icing Buttercream Recipe Sugar Free Frosting

Author: Rally Rus
This keto buttercream frosting is smooth, creamy, and perfect for decorating sugar cookies, cakes, cupcakes, and more. It has a rich vanilla flavor and a beautiful glossy finish. Plus, it’s low-carb, gluten-free, and sugar-free, so you can enjoy it without guilt.
5 from 1 vote
Net Carbs: 0.1g
Print Recipe Pin Recipe
Prep Time 10 minutes
Total Time 10 minutes
Course Dessert
Cuisine American
Servings 24 servings
Calories 39.6 kcal

Equipment

  • 1 Spatula
  • 1 Pyrex Ribbed Bowls
  • 1 Measuring cups and spoons

Ingredients
 
 

  • 3 tablespoons Swerve
  • 2 Egg Whites
  • 1/2 cup Unsalted Butter
  • 2 tablespoons Heavy Cream
  • 1/4 teaspoon Sugar Free Vanilla Extract

Instructions
 

  • In a small bowl, whisk the egg whites and swerve together until well combined. 
  • In a large mixing bowl, whisk the butter with an electric mixer or a stand mixer fitted with the paddle attachment until smooth and creamy.
  • Add the cream and vanilla extract and whisk again until well incorporated.
  • Gradually add the egg white mixture to the butter mixture, whisking on low speed until smooth and glossy.
  • Transfer the keto royal icing buttercream to a piping bag fitted with your desired tip and decorate your keto cookies or cakes as you like. You can also use a spatula or a knife to spread the frosting evenly.
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Notes

Enjoy your keto royal icing buttercream or store it in an airtight container in the fridge for up to a week.
You can also freeze it for up to 3 months and thaw it in the fridge before using.
Check the FAQ section below for more tips and swap ideas.

Nutrition

Calories: 39.6kcalCarbohydrates: 0.1gNet Carbs: 0.1gProtein: 0.3gFat: 4.3gSaturated Fat: 2.7gSodium: 5mgPotassium: 6.5mgSugar: 0.1gVitamin A: 136.6IUVitamin C: 0.01mgCalcium: 2.1mgIron: 0.004mg
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