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3-Minute Ketogenic Blueberry Mug Cake

With a total of 13g of Net Carbs per cake, this little treat can be the perfect option for a dessert or even breakfast. The mug cake is full of nutrients and yet makes you feel like you’re cheating!

low carb blueberry mug cake

Why Should You Make This Keto Mug Cake?

Diets are all about balance. If you’re on a low carb or keto diet, you may be avoiding desserts.

After all, desserts are typically loaded with sugar. And sugar is definitely not good for helping you stay in a state of ketosis- or maintaining your waistline.

However, you’re only human. Sometimes you just crave cake but don’t want to blow your diet.

This keto mug cake is meant for those times. At only 13 grams of net carbs, it’s perfect for a low carb diet.

If you’re following a strict ketogenic diet, no worries. Just split your cake with a loved one- I’m sure they’ll appreciate it.

It’s also high in fat and has a decent amount of protein and fiber. So, you feel satiated after eating it.

As an added bonus, it also provides 23% of your daily vitamin C needs and 15% of your daily vitamin A needs.

So, it’s great for your eyes and fighting off colds.

It also provides close to 10% of your daily calcium and iron needs. So, it’s good for your bones and your energy levels as well.

Besides being good for you, this cake is pretty tasty as well. It has a nice moist, cakey texture bursting with blueberries.

It also has a hint of vanilla and some tartness that balances out the sweetness.

Topped with some whipped cream, it makes a pretty nice dessert.

What You’ll Need to Make This Flavorful Cake

keto blueberry mug cake recipe

1. Coconut Flour

To make this cake low carb, you’re going to use coconut flour.

Coconut flour is one of my favorite flours for low carb baking. And since it absorbs moisture well, a little goes a long way.

Coconut flour is nutritious and packed with good fats. For instance, ¼ cup of coconut flour provides a whopping 10 grams of fiber and 20% of your daily iron needs.

It is also rich in medium-chain triglycerides which may help you lose weight, and even boost your heart and brain health.

But, best of all, it is pretty low in net carbs compared to all-purpose flour.

For instance, 30 grams of all-purpose flour contains 22 grams of net carbs– more than enough to kick you out of ketosis.

However, 30 grams of coconut flour contains only 7.5 grams of net carbs. And since a little goes a long way, you don’t need to use much of it when you bake.

So, coconut flour is the perfect flour for baking, and even thickening your sauces. If you’re new to coconut flour be sure to give some a try here.

2. Double Cream

Since coconut flour can be drying, you’re also going to be using some double cream.

Double cream makes the cake nice and moist. The last thing you want is a dry cake!

3. Blueberries

And for that nice burst of blueberry flavor, you’ll be using some fresh blueberries.

Blueberries are not only tasty but pretty nutritious as well.

One cup of blueberries provides 36% of your daily vitamin K needs and 24% of your vitamin C needs. They contain tons of antioxidants as well.

4. Sweetener

For added sweetness, you’ll be using erythritol. Erythritol is a natural sweetener that doesn’t cause blood sugar spikes.

You can use it in your baking or even your tea or coffee. If you’d like to give it a try, you can get some here.

5. Lemons

And let’s not forget the fresh lemon juice. You’re going to be using it to balance out the sweetness.

Besides adding some tartness, fresh lemon juice is also good for you.

Just one cup of it provides a whopping 187% of your vitamin C needs!

So, this cake is pretty tasty, and good for you too. How about that for a power snack!

What’s so Great About Mug Cakes

keto mug cake with blueberries

Mug cakes are pretty good if you’re trying to watch your weight. You make your individual portion, eat it, then you’re done.

Compare that with making an entire cake. When you have an entire cake lying around, you just keep going back to it, and back to it.

Before you know it, the whole cake is gone. And you pack on the pounds.

This mug cake contains only 269 calories. Which is way less than an entire cake.

Also, mug cakes are pretty quick and pretty easy to make.

For instance, this mug cake takes less than 5 minutes to make. Much less time than it would take to make an entire cake.

Watch Full Instructions

Loving the Cakes?

low carb blueberry mug cake

If you love this cake, feel free to try my Low Carb Microwave Peanut Butter Cake and my Keto Chocolate Coconut Mug Cake.

My Low Carb Microwave Peanut Butter Cake is the perfect cake to make when you have company coming over. It has a nice, spongy texture and a beautiful peanut butter taste.

And it takes only 10 minutes to make in your microwave.

My Keto Chocolate Coconut Mug Cake is great for when you’re craving chocolate cake. It’s moist and perfect for scooping. And it’s layered with tons of chocolate with some coconut to balance it out.

And since it takes less than 5 minutes to make, it’s the perfect cake when you’re on the run.

Other Keto Foods You May Like

21 No Carb Snacks to Put You Into Ketosis

18 Keto Mug Cakes Everyone Will Love

20 Keto Comfort Foods The Whole Fam Will Love

keto blueberry mug cake

Keto Blueberry Mug Cake

Yield: 1 mug cake
Prep Time: 2 minutes
Cook Time: 1 minute
Total Time: 3 minutes

A low carb treat that's full of nutritional value. You can have it as a low carb dessert or low carb breakfast, either way, it's great when you're on the keto diet.


  • 1 egg
  • 2 tbsp double cream
  • 2 tbsp coconut flour
  • 10-12 blueberries
  • 2 tbsp fresh lemon juice
  • 1/4 tsp vanilla extract
  • 2 tbsp granulated erythritol
  • 1/4 tsp baking powder
  • pinch of salt


  1. Whisk egg, double cream, lemon juice, and vanilla extract together.
  2. Mix coconut flour, erythritol, baking powder and salt in a separate bowl.
  3. Mix dry and wet ingredients. Softly mix in the blueberries.
  4. Pour the batter into a mug. Microwave for 60 seconds at 800 watts. Check out with a toothpick whether it’s cooked. If not, continue microwaving and continue checking every 20 seconds.
  5. You can add some whipped cream on top for that extra moisture if you wish. That’s completely optional though.
Nutrition Information:
Yield: 1 Serving Size: 1 mug cake
Amount Per Serving: Calories: 276Total Fat: 20gSaturated Fat: 10gCarbohydrates: 14gNet Carbohydrates: 10.2gFiber: 3.8gSugar: 6.1gProtein: 10g

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Monday 8th of May 2023

Can this recipe be done with plant milk instead of cows milk? I’m lactose and prefer coconut milk/cream/heavy cream the best over all but really wondering if I can steer clear of dairy cream. Thank you.

Karo @ AllNutritious

Tuesday 9th of May 2023

yes, you can use coconut cream :)

Mary Beth Harrer

Tuesday 5th of January 2021

Hi, can I make this with almond flower instead of coconut flower?

Karo @ AllNutritious

Tuesday 5th of January 2021

Hey Mary, Yes, you'll need to use 4x almond flour though. So, in this case you'd want to use 8 tbsp instead of 2.


Wednesday 14th of October 2020


I don’t own a microwave and don’t want one. So, how long would it take to make this blueberry mug cake and all the featured mug cakes in a convection oven?


Karo Tries

Wednesday 14th of October 2020

Good question Simone!

You can bake the mug cake in the oven at 350F for 15-20 minutes. :)

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