Image of Keto Blueberry Mug Cake

Easy Keto Blueberry Mug Cake Recipe With Coconut Flour

A light and fluffy blueberry cake that is low carb and keto-friendly. This easy cake cooks in the microwave and is ready in just 5 minutes.

This super easy and ultra-fresh Keto Blueberry Mug Cake takes just minutes to make and is super delicious. This guilt-free mug cake is low carb & gluten-free, and a single serving for a delicious treat and portion control.

Once it’s blueberry season, they are hard to resist. Thankfully, blueberries can fit into a keto diet or low-carb diet when eaten in moderation.

If you’d like to see how I made this recipe, check out my quick YouTube video for helpful process shots and tips!

Easy Keto Blueberry Mug Cake Recipe With Coconut Flour

The Keto Mug Cake Recipe is a quick and simple mug cake as delicious as it is easy! A delicious way to satisfy your sweet cravings.

This gluten free healthy mug cake is so easy to make and is super customizable. You can swap blueberries for your favorite fruit, add some cocoa powder to make it a chocolate cake, or just make a plain vanilla cake.

Dive into a symphony of flavors, and let the Keto blueberry muffin like mug cake be your companion on this wholesome adventure.


  • coconut flour
  • baking powder
  • Swerve
  • Himalayan salt
  • egg
  • coconut oil
  • fresh blueberries
  • Vanilla extract
  • Optional: lemon zest

How To Make Blueberry Keto Mug Cake Recipe

Start by getting a microwave-safe mug for your recipe. It’s important to choose a coffee mug that is wide and shallow enough to allow your cake to cook evenly all the way through. You can use small ramekin as well.

I use this mug cake mug.

Start by gathering all the ingredients listed below: coconut flour, baking powder, Swerve, an egg, vanilla extract, coconut oil, and blueberries. Use a microwave-safe mug for this recipe.

First step, combine coconut flour, baking powder, and Swerve in your mug. If your blueberries are very sweet, consider reducing the sweetener. Mix these dry ingredients thoroughly.

Next, crack the egg into the mug. Add vanilla extract and melted coconut oil. Stir these wet ingredients into the dry mixture until you have a smooth batter.

Once your batter is smooth, gently fold in the fresh or frozen blueberries. Adding more fruit will increase the net carbs.

Place your mug in the microwave. Cook on high for about 90 seconds to 2 minutes, or until the cake has risen and feels firm. Carefully remove the mug—it will be hot. Let it cool for a moment, then enjoy your gluten-free, dairy-free keto blueberry mug cake!

Remember, microwave powers vary. You might need to adjust the cooking time. Also, while blueberries are low in carbs, they contain some sugar. Keep this in mind when calculating your daily carb intake, especially if you’re strictly following a ketogenic diet.

Image of all ingredients for Keto Blueberry Mug Cake
Keto Blueberry Mug Cake

For an extra touch of elegance, decorate your mug cake with fresh berries and a dollop of whipped cream, along with a sprinkle of Swerve or a dash of your favorite sugar-free powdered sweetener. This not only enhances the presentation but also adds layers of texture and flavor. 

This Gluten-Free, Dairy-Free Keto Blueberry Mug Cake is a quick, delicious option for a healthy dessert. It’s perfect for satisfying a sweet tooth without any guilt!

With every spoonful of this delightful keto blueberry mug cake, you’re nourishing your body with health benefits. You’ll satisfy your sweet tooth while contributing to your overall well-being.

This 90-Second low-carb blueberry mug cake with Coconut Flour is a testament to the delightful possibilities of the keto journey. It’s low-carb, gluten-free, and made quickly in the microwave. This recipe celebrates mindful indulgence. As you enjoy each light, fluffy bite, you embrace the harmony of taste and wellness.

Go ahead, and create this simple masterpiece. Relish the burst of blueberries and bask in the joy of guilt-free enjoyment. Here’s to savoring life’s sweetness, one keto-friendly bite at a time!

Image of Keto Blueberry Mug Cake
Keto Blueberry Mug Cake

How to Check Your Low Carb Mug Cake

Perform a quick test to determine if your mug cake is done. At the end of your cooking time, insert a toothpick into the center of the cake. If it comes out clean, your cake is done. If there’s batter on the toothpick, give your cake another 10 to 15 seconds in the microwave before performing the toothpick test again.

Once the keto cake is done, let it cool for a couple of minutes before digging in. Then, garnish with some fresh blueberries, or any keto-friendly toppings of your choice.

From start to finish, this convenient and guilt-free Keto Blueberryberry Mug Cake should take less than 5 minutes to create. Enjoy

Recipe Modification

You can make a substitute if you prefer an alternative to coconut flour such as almond flour. Keep in mind that you cannot replace these two flours 1:1 since coconut flour is a lot more absorbent. Thus, if you decide to use almond flour, you need to increase the quantity to 3 tablespoons for the same texture.

The Swerve in this low carb blueberry mug cake recipe acts as a sugar substitute that adds sweetness without additional carbs. If you are not fond of Swerve or if it’s not available, you could use alternative keto sweeteners such as stevia or erythritol. Remember always to taste your batter before baking to ensure it’s sweet enough according to your preference as the fruit sweetness varies.

Image of Keto Blueberry Mug Cake
Keto Blueberry Mug Cake

To modify this recipe for personal diet restrictions, first, consider your sensitivities or allergies. For those allergic to coconut, consider using other nut flours and oils. Almond flour and melted butter are great options. Meanwhile, if you’re allergic to eggs, you can try using a flax or chia egg instead.

The vanilla extract enhances the flavor of this mug cake, but you can switch it up based on your flavor preferences. For example, almond extract, orange extract, or even a dash of cinnamon could add a unique spin to this cake.

To respect portion sizes, you could split the finished mug cake into two servings. Alternatively, if you want to increase the portion size, double the recipe. Nonetheless, the mug size should be big enough for the increased quantity and microwave settings may vary. Make a low carb vanilla mug cake by skipping the fruit.

Lastly, if blueberries are not your favorite or are out of season, feel free to switch them with other keto-friendly fruits such as raspberries or strawberries or add sugar free chocolate chips. Just make sure to adjust the quantity based on the fruit’s carb count to keep the cake keto-friendly.

More Keto Desserts To Check

More Keto Mug Cakes To Check

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Keto Blueberry Mug Cake With Coconut Flour

Author: Rally Rus
Ready in just 90 seconds, this mug cake is a quick, delicious, and low-carb option. With the added benefits of antioxidant-rich blueberries, this mug cake is a guilt-free delight suitable for gluten-free diets as well.
5 from 1 vote
Net Carbs: 2.4g
Print Recipe Pin Recipe
Prep Time 3 minutes
Cook Time 2 minutes
Total Time 5 minutes
Course Dessert
Cuisine Keto Diet
Servings 1 servings
Calories 218.1 kcal



  • 1 tbsp coconut flour
  • 1/4 tsp baking powder
  • 1 tbsp Swerve
  • 1 pinch Himalayan salt
  • 1 egg
  • 1 tbsp coconut oil
  • 1 tbsp fresh blueberries
  • 1/2 tsp Vanilla extract


  • Mix your dry ingredients: 1 tbsp coconut flour, 1 tbsp Swerve, 1⁄4 tsp baking powder, and a pinch of Himalayan salt in a microwave-safe mug.
  • Stir well to ensure there are no lumps in your mixture.
  • Next, add in your wet ingredients: 1 medium egg, 1⁄2 tsp of vanilla extract, and 1 tbsp of melted coconut oil.
  • Stir well again to obtain a smooth, homogeneous mixture.
  • Add the blueberries. Push them into the batter a little bit.
  • Place your mug in the microwave and cook it on high for about 1 minute 30 seconds. Keep in mind that microwave power levels can vary, so you might need to adjust the time a bit.
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  • You can use any sweetener.
  • For more information about the ingredients in this recipe, see the detailed instructions above the recipe.
  • You can cook the mug cake in a preheated oven to 440F/220C for 12-15 minutes.
  • To store any leftover Keto Blueberry Mug Cake, let it cool down completely first. Then, transfer it to an airtight container and store it in the refrigerator for up to 3 days. To reheat, microwave it for 15-20 seconds until warm.
  • Top with a dollop of whipped cream or whipped coconut cream for extra indulgence.
  • Drizzle with sugar-free chocolate syrup for a decadent treat.
  • Serve with a scoop of low-carb vanilla ice cream for a refreshing dessert.
  • Enjoy alongside a hot cup of coffee or tea for a cozy snack.


Serving: 1servingCalories: 218.1kcalCarbohydrates: 5.6gNet Carbs: 2.4gProtein: 6.6gFat: 19.1gSaturated Fat: 13.9gSodium: 222.2mgPotassium: 72.3mgFiber: 3.2gSugar: 2.1gVitamin A: 245.6IUVitamin C: 1.4mgCalcium: 84.5mgIron: 1.1mg
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