Keto Lemon Blueberry Cake: Gooey Butter Cake with a Twist

It was 3 AM. The dog was barking at a squirrel that probably wasn’t there. My husband was snoring louder than usual. And I, bless my tired soul, was elbow-deep in almond flour, cursing under my breath. I had this vision of a perfect, airy, lemony dessert, much like the classic low-carb butter cake, but it wasn’t cooperating with reality.

The first batch? Let’s just say it looked more like a lemon-flavored brick than a cake. I almost gave up, but after a few tries and some simple almond flour recipes under my belt, I found the right balance. That is how this recipe was born: from a 3 AM disaster to something pretty darn good.

What You’ll Love About This Keto Lemon Blueberry Cake

This isn’t some fussy cake. It tastes like sunshine, without all the sugar. It’s got that soft, slightly gooey texture you want, with bursts of tangy lemon and sweet blueberries.

It’s the kind of dessert that tricks people. They taste it, and they don’t even realize it’s low-carb. That’s the best compliment you can get, really. A real keeper, this one.

Ingredients for Keto Blueberry Lemon Gooey Butter Cake

Getting the right ingredients is half the battle for any good recipe. For this cake, we’re focusing on low-carb, flavorful stuff. Don’t skimp here; quality matters.

Keto Lemon Blueberry Cake – Dry Ingredients

1 cup almond flour – This is our base. Use a fine-ground blanched almond flour for best results. It makes a difference in texture.

1/4 cup Swerve Granular – Our main sweetener for the crust. It measures cup-for-cup like sugar, but without the aftertaste.

2 tbsp coconut flour – A little bit goes a long way. It helps absorb moisture and gives a lovely texture to the crust.

1 teaspoon baking powder – Essential for lift. Make sure it’s fresh, or your cake won’t rise properly.

¼ teaspoon salt – Don’t skip the salt. It balances the sweetness and brings out all the other flavors.

Keto Lemon Blueberry Cake – Wet Ingredients

¼ cup butter melted – For the crust. Melted butter brings the dry ingredients together and gives a rich flavor.

1 large egg – Binds the crust and adds structure.

1 tsp lemon zest – This is important. Zest is where all the lemon oil and intense flavor hides.

For the Keto Lemon Blueberry Cake Topping

6 ounces cream cheese softened – The base of our creamy filling. Make sure it’s soft, or you’ll have lumps.

¼ cup butter softened – Again, soft is key. It mixes smoothly with the cream cheese and makes the filling rich.

⅓ cup Swerve Confectioners – Our powdered sweetener for the filling. It dissolves nicely, giving a smooth texture.

1 large egg, room temperature – Another binder for the filling. Room temperature eggs mix better and create a smoother batter.

2 tsp lemon zest – More lemon zest! Can you tell I like lemon? It brightens everything up.

2 tbsp lemon juice – Freshly squeezed, please. The bottled stuff just doesn’t compare.

1/2 teaspoon lemon extract (optional) – If you really want that lemon flavor to sing, add this.

3/4 cup blueberries – Fresh or frozen, but if frozen, don’t thaw them.

How to Make Keto Lemon Blueberry Cake

This isn’t complicated. We’re just putting things together in the right order. Follow these steps, and you’ll have a fantastic cake.

Keto Lemon Blueberry Cake – Step 1: Prep Work

First, preheat your oven to 325ºF. Get your 8×8 glass or ceramic baking dish and lightly grease it. This step ensures your cake doesn’t stick.

Keto Lemon Blueberry Cake – Step 2: Mix the Batter

Grab a big bowl. Toss in the almond flour, granular Swerve, coconut flour, baking powder, and salt. Add the butter, egg, and lemon zest, stirring until it forms a dough.

Press this mixture firmly into the bottom of your prepared pan. Make sure it goes partway up the sides to form a crust.

Keto Lemon Blueberry Cake – Step 3: Bake to Golden Perfection

In another bowl, beat the cream cheese, butter, confectioners Swerve, egg, zest, juice, and optional extract until smooth. Fold in the blueberries.

Pour over the crust and bake for 30 to 35 minutes. You’re looking for the edges to be golden brown and the filling to have a slight jiggle in the center.

Tips for the Perfect Keto Gooey Butter Cake

Always make sure your ingredients are properly softened. If you’re looking for a quick fix for other cravings, sometimes I find that easy mug desserts hit the spot when you’re in a hurry.

Don’t overbake. This is critical for the “gooey” part. If it looks completely set and solid, you’ve gone too far.

Variations and Substitutions

You can always play around with recipes. That’s the fun of cooking. Swap the blueberries for raspberries if you’re out, or use orange zest for a different profile.

If you are interested in the deeper science of the ingredients, particularly the health benefits of using almond skin properties, there is some fascinating research on the topic.

Blueberry Lemon Keto Gooey Butter Cake

A healthy keto twist on a classic dessert featuring a buttery crust topped with a rich, tangy lemon-blueberry cheesecake filling.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 35 minutes mins

Total Time 50 minutes mins

Servings: 9 servings

Ingredients Method

Ingredients

  

• 1 cup almond flour
• 1/4 cup Swerve Granular
• 2 tbsp coconut flour
• 1 teaspoon baking powder
• 1/4 teaspoon salt
• 1/4 cup butter melted
• 1 large egg
• 1 tsp lemon zest
• 6 ounces cream cheese softened
• 1/4 cup butter softened
• 1/3 cup Swerve Confectioners
• 1 large egg room temperature
• 2 tsp lemon zest
• 2 tbsp lemon juice
• 1/2 teaspoon lemon extract optional
• 3/4 cup blueberries
• Powdered Swerve for dusting

Method

 

1. Preheat the oven to 325ºF and lightly grease an 8x8 glass or ceramic baking dish.
2. In a large bowl, combine the almond flour, sweetener, coconut flour, baking powder, and salt. Stir in the butter, egg, and lemon zest until well combined.
3. Press this mixture into the bottom and partway up the sides of the prepared baking pan.
4. In another large bowl, beat the cream cheese and butter together until smooth. Beat in the sweetener until well combined.
5. Beat in the egg, lemon zest, lemon juice, and lemon extract. Stir in the blueberries by hand.
6. Pour the filling over the crust. Bake 30 to 35 minutes, until the filling is mostly set, but the center still jiggles, and the edges are just golden brown.
7. Remove and let cool, then dust with powdered sweetener and cut into bars.