Easy Moist Vanilla Sponge Cake Low Carb Sugar-Free Recipe
low carb sponge cake

Keto Vanilla Sponge Cake with Coconut Flour

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If you are tired of preparing the same desserts and you want something new, then we want to offer you the unsurpassed low carb, sugar-free and keto-friendly sponge cake. This dessert will make you fall in love!

We use eggs and coconut flour as the base instead of traditional enriched flour that most cakes call for, which contains too many carbs to be eaten on a low-carb diet.

Additionally, traditional flour tends to provoke inflammation in many people, and this can lead to an increased risk of chronic diseases, hormone problems, weight gain, and more.

Eggs contain a large amount of protein and vitamin D, which are needed for the strength of the bones. In addition, they increase immunity, help eliminate harmful cholesterol and improve the body’s condition (1).

Look for eggs that are organic and pasture-raised as they tend to contain more nutrients, such as certain vitamins and healthy fats. You can usually see the difference between organic eggs and conventionally-raised eggs. They tend to have a brighter yolk that looks more vibrant!

Flour is an indispensable component of baking. We suggest using coconut flour, which is gluten free, low in carbs, and high in fiber. Not to mention, it gives your cake a nutty and delicious taste!

sugar free vanilla sponge cake

Coconut flour goes well with almond flour in most recipes. However, coconut flour is not as dense as almond flour. So we recommend keeping almond flour out of this recipe to keep your sponge cake light and fluffy.

This recipe also uses a low-carbohydrate sugar-free protein powder. We choose collagen protein because we want to make a cake not only delicious but also helps keep your hair, skin, and cells healthy.

This dessert takes about 40 minute to prepare. It’s a perfect dessert to share with your family and friends. 

This cake is relatively easy to prepare. Start by combining the coconut flour with dry ingredients. Then whisk together the wet ingredients. You’ll want to beat the egg whites until soft peaks start to form. Then gently fold them into the rest of the ingredients. This is what helps keep the cake soft and spongy. 

Pour batter into a pan and cook in the oven for 25 minutes. This cake is sweetened by erythritol, but you can use any keto-friendly sugar substitute you have on hand. 

Let’s Do It!

First, preheat your oven to 350F. In a bowl, mix all dry ingredients. 

mix flour collagen erythritol

In another bowl, beat egg yolks with melted butter and vanilla extract and combine with dry ingredients.

 beat egg yolks with melted butter and vanilla

Beat egg whites until bubbles start to form. Add a pinch of salt and lemon juice and beat until the whites begin to increase in volume. This will make the cake moist and fluffy.

beat egg white salt lemon juice

Add lemon zest and continue to beat until stiff peaks form. Gently fold beaten egg whites in egg yolk mixture. 

fold egg whites in yolk mixture

Transfer the dough to a loose-base cake mold and place in the oven for 30 minutes. Allow the cake to cool.

bake sponge cake

Serve as is or top with your favorite low-carb topping or icing. Enjoy!

keto collagen sponge cake


low carb sponge cake
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4.72 from 7 votes

Keto Vanilla Sponge Cake

A low-carb, sugar-free and ketogenic-friendly sponge cake using coconut flour and eggs with a touch of collagen for your keto dessert.
Course Dessert
Cuisine Ketogenic, Low Carb
Keyword low carb sponge cake, sugar free sponge cake
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings 8
Calories 160kcal
Author Tanya K.



  • Preheat the oven to 350F.
  • In a bowl, combine coconut flour, collagen powder, erythritol and baking powder.
  • Whisk egg yolks with melted butter and vanilla extract, then add mixture of dry ingredients and combine.
  • Beat egg whites until bubbles start to form. Add a pinch of salt and lemon juice and beat until the whites begin to increase in volume. Add lemon zest and beat until stiff peaks form.
  • Fold beaten egg whites in egg yolk mixture until blended through.
  • Grease a loose bottom 9-inch cake tin or any standard springform pan you have with butter then line the bottom with baking paper or use silicone cake mold.
  • Pour the batter to the cake tin and bake for 25 minutes or until golden on top.
  • Let the cake cool completely before removing it from the pan and adding your favorite topping or icing of your choice (optional).



Nutrition Facts
Keto Vanilla Sponge Cake
Amount Per Serving
Calories 160 Calories from Fat 117
% Daily Value*
Fat 13g20%
Saturated Fat 6g30%
Cholesterol 183mg61%
Sodium 147mg6%
Potassium 143mg4%
Carbohydrates 3g1%
Fiber 1g4%
Sugar 1g1%
Protein 8g16%
Vitamin A 459IU9%
Vitamin C 1mg1%
Calcium 53mg5%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.
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