This Keto Lemon Cake with Blueberries is a moist lemon almond cake with a delicious keto cream cheese buttercream frosting.
Bonus, this sugar-free lemon blueberry cake is also gluten-free!
Table of contents
What’s A Keto Blueberry Cake
A Keto Blueberry Cake is a low-carb cake made from two sponge cake layers that contain fresh blueberries and a delicious sugar-free blueberry coulis.
I couldn’t resist adding blueberries to this cake. I have a passion for the lemon-blueberry combo, and I can’t stop myself. So keto lemon almond cake to the rescue!
NEWMy no-fail Keto Baking Recipe ebooks are now available
Why You’ll Love This Recipe
This cake is delicious, but it’s also:
- Gluten-Free
- Keto-Friendly (4.9g of net carbs)
- Vegetarian
- Refine Sugar-Free
- Made in 1 Bowl
- Ready in jut 45 minutes
How To Make Keto Blueberry Cake
This sugar-free lemon blueberry cake is a 1-bowl recipe. It means that the whole keto cake batter makes two cake layers, and you won’t have to repeat the recipe twice.
How cool is that? You know I love easy keto recipes, especially when it comes to keto desserts, as I can’t wait to fix my sweet tooth.
Ingredients
So all you need to make a lovely keto lemon cake are a few ingredients :
- Almond flour – I recommend super fine unblanched almond flour for best results and to avoid the gritty texture of almonds.
- Coconut flour – make sure it is fresh flour with no lumps. Also, always measure your coconut flour scooped and leveled to avoid adding too much of it – this would significantly dry out the lemon cake.
- Sugar-free crystal sweetener like erythritol or monk fruit stevia blend. Check my top 4 keto-friendly sweeteners to find out which ones I prefer!
- Lemon juice
- Eggs – this is very important to use large eggs at room temperature.
- Coconut oil – melted at room temperature or lukewarm but not hot, or it will ‘cook’ the eggs.
- Blueberries – fresh or frozen. Blueberry is relatively high in carbs, so it is important not to add too many. Check out my list of keto-friendly fruit to learn which fruits are the best on your keto journey.
- Lemon zest – from an organic lemon.
- Baking powder
- Baking soda
- Vanilla
Making Keto Buttercream
The combo of butter and cream cheese makes the most delicious keto lemon frosting for this lemon cake. Cream cheese and lemon cake go really well together!
Buttercream Ingredients
All you need for the frosting are:
- Softened cream cheese – bring it out of the fridge 1 hour before making the frosting.
- Softened butter – I recommend you bring the butter to room temperature for 3 hours before making the frosting. Also, precutting the butter into cubes will make it soften faster.
- Lemon juice
- Powdered sugar-free sweetener – same as above but powdered. If you can’t find powdered sugar-free sweeteners in your supermarket, crush the crystal sugar-free sweetener into a blender. Blend 45 seconds on high speed to make your own sugar-free icing sweetener!
- Unsweetened almond milk or heavy cream
Sugar-Free Blueberry Chia Coulis
This cake wouldn’t be the same without the tangy lemon blueberry coulis.
Of course, this is optional, but trust me, this brings this keto lemon cake to the next level.
Bonus, this coulis doesn’t require fancy ingredients and only 3 minutes to make, so you don’t have to sweat it!
Simply gather:
- Blueberries – fresh or frozen.
- Chia seeds – this helps thicken the coulis.
- Sugar-free crystal sweeteners like erythritol or monk fruit stevia blend.
- Water
- Lemon juice
Storage Instructions
If you’ve made a little too much frosting or coulis, you can store any leftovers in an airtight container in the fridge for up to 3 days.
You can store this keto blueberry cake in the fridge in a cake box for up to 3 days.
You can also freeze cake slices, but I recommend freezing the unfrosted cake for better taste when defrosted.
Defrost the slices in the fridge for a few hours.
More Keto Cakes Recipes
If you like healthy cakes, you’ll love my other cake recipes:
Keto Vanilla Cake
Keto Flourless Chocolate Cake
Keto Chocolate Cake
Gluten-Free Coconut Cake
Keto Pineapple Upside-Down Cake
No-Bake Keto Cheesecake
Keto Cake
Keto Carrot Cake
Keto Red Velvet Cake
Keto Lemon Bars
Made this keto lemon cake yet? Follow me on Instagram and share a picture on your Instagram story tagging my page! I love to reshare your creation with my Instagram followers and see what you made.
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Keto Lemon Cake with Blueberries
4.9gNet Carbs
Keto lemon blueberry cake with lemon buttercream frosting.
Author: Carine Claudepierre
Prep: 20 minutes mins
Cook: 25 minutes mins
Total: 45 minutes mins
Yield: 24 people
Serving Size: 1 slice
4.94 from 682 votes
Ingredients
US Customary – Metric
- 2 ¼ cups Almond Flour packed, fine
- ⅓ cup Coconut Flour
- 1 ¼ teaspoon Baking Powder
- ¼ teaspoon Baking Soda
- 6 large Eggs at room temperature
- ¾ cup Granulated Sweetener monk fruit or erythritol or xylitol
- 2 tablespoons Lemon Zest
- ⅓ cup Lemon Juice at room temperature
- ½ cup Coconut Oil lukewarm, not hot
- 1 teaspoon Vanilla Extract
- ¾ cup Blueberries fresh or frozen
Keto Lemon buttercream frosting
- ¾ cup Unsalted Butter soft, at room temperature, out of the fridge for 3 hours
- 12 oz Cream Cheese soft, at room temperature, out of the fridge for 1 hour
- 2 ½ tablespoons Lemon Juice at room temperature
- 2 tablespoons Unsweetened Almond Milk at room temperature
- ⅔ cup Powdered Erythritol erythritol or Monk fruit
Blueberry chia coulis
- 1 cup Blueberries
- 2 teaspoons Chia Seeds
- 2 tablespoons Granulated Sweetener
- 2 tablespoons Lemon Juice
- 1 tablespoon Water
This recipe may contain Amazon or other affiliate links. As an Amazon Associate I earn from qualifying purchases.
Instructions
Before you start, make sure ALL the ingredients are at room temperature including eggs, lemon juice, unsweetened almond milk, and flours.
Preheat oven to 350°F (180°C).
Grease two 9-inch round cake pans with coconut oil or butter. Set aside.
In a large mixing bowl, combine almond flour, coconut flour baking powder, and baking soda. Set aside.
In another mixing bowl, add eggs (at room temperature) with sugar-free crystal sweetener. Beat on high speed for 45 seconds until foamy and lighter in color.
Bring back the mixing bowl with the dry ingredients. Make a well in the center of the flour and add the lemon zest, lemon juice, melted coconut oil, vanilla, and beaten eggs.
Beat gently on low speed to incorporate all the ingredients together and form a consistent cake batter.
Stop the electric beater, and using a spatula, fold in the blueberries into the batter.
Transfer half of the cake batter into one cake pan and the other half of the batter into the second cake pan. You now have two cake pans filled with roughly the same amount of cake batter.
Bake each cake layer for 20-25 minutes or until a skewer inserted in the center of the cake comes out clean. If you have a convection mode on your oven you can easily bake the two cake layers at the same time. Otherwise, it is preferable to bake one cake layer at a time. You can keep the second layer at room temperature while the first cake layer is baking.
Let the cake cool down for 10 minutes in the pan then release it on a cooling rack.
Cool down for at least 3 hours or until the cakes are at room temperature before frosting. Don't cool down in the fridge, or the cakes will lose their moisture and become dense.
Keto lemon buttercream
In a medium-size mixing bowl, add the soft butter, and using an electric beater, beat soft butter for 1 minute. Stop beater, then add softened cream cheese.
Beat on medium speed for about 1-2 minutes or until fluffy and light in color.
Stop the beater and add in lemon juice, unsweetened almond milk, and powdered sugar-free sweeteners.
Beat again, at low speed first, to prevent the powdered sugar from bursting outside of the mixing bowl, then on medium speed until the frosting is thick.
Use the frosting to assemble the 2-layer cake.
You can make the frosting ahead of time and store it in the fridge in an airtight container while the cake layers are cooling down.
Blueberry chia coulis
In a small saucepan, add blueberries, lemon juice, chia seeds, and sugar-free powdered sweetener.
Bring to a boil, smash the blueberries with a fork, then simmer 2-3 minutes, stirring constantly until it forms a slightly thick coulis.
Use the coulis between the cake layer, preferably add on top of the first layer of buttercream.
Storage
Store leftover frosting, coulis in an airtight container in the fridge for up to 3 days.
Store the lemon cake in the fridge in a cake box for up to 3 days. You can freeze the cake too, but I recommend freezing unfrosted cake for better taste when defrosted.
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Serving Size: 1 slice
Yield: 24 people
Serving: 1sliceCalories: 235kcal (12%)Carbohydrates: 6.2g (2%)Fiber: 1.3g (5%)Net Carbs: 4.9gProtein: 4.5g (9%)Fat: 18.5g (28%)Sugar: 2.6g (3%)
About The Author
Carine Claudepierre
Hi, I'm Carine, the food blogger, author, recipe developer, published author of a cookbook and many ebooks, and founder of Sweet As Honey.
I have an Accredited Certificate in Nutrition and Wellness obtained in 2014 from Well College Global (formerly Cadence Health). I'm passionate about sharing all my easy and tasty recipes that are both delicious and healthy. My expertise in the field comes from my background in chemistry and years of following a keto low-carb diet. But I'm also well versed in vegetarian and vegan cooking since my husband is vegan.
I now eat a more balanced diet where I alternate between keto and a Mediterranean Diet
Cooking and Baking is my true passion. In fact, I only share a small portion of my recipes on Sweet As Honey. Most of them are eaten by my husband and my two kids before I have time to take any pictures!
All my recipes are at least triple tested to make sure they work and I take pride in keeping them as accurate as possible.
Browse all my recipes with my Recipe Index.
I hope that you too find the recipes you love on Sweet As Honey!
