The Best Keto Lava Cake – Low Carb Molten Mug Cake with only 4g Carbs

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This keto lava cake is the best keto dessert! It’s incredibly chocolatey, rich, moist and creamy. At only 4g net carbs you can serve it with your favorite low carb ice-cream! It’s ready in less than 20 minutes, and it’s perfect for a party or a festive event! Or to enjoy whenever you want!

keto lava cake low carb dessert

Having a sweet tooth on a keto diet is one of the main reasons why people give up and indulge in sugary processed foods. Cutting the sugar out of the diet doesn’t have to be boring and fad.

Our brain is addicted to being fuelled by glucose, but switching to the most stable fuel, ketones you will have energy all day long, and your cravings will go away.

Watch the video below to see how easy it is to make a delicious keto lava cake and surprise your guests with a sugar-free dessert!

Low Carb, Moist Keto Lava Cake

keto lava cake serving size

Dessert on the keto diet is definitely a good idea if we use the right kind of low-carb flours and keto-approved sweeteners.

My first dessert, I’ve ever made on my ketogenic journey was a one-minute chocolate mug cake brownie. I could eat it every day and still hit my macros perfectly.

After having such great success with a keto dessert, I wanted to move forward and bake a low carb dessert. I searched for desserts and found plenty of keto alternatives.

Some of my favorite desserts include chocolate of course, and you seem to resonate with me too. Have you tried my keto brownies with almond flour? They are one of the most loved desserts on this blog!

I’m experimenting with lots of flours lately: coconut flour, almond flour, flaxseed flour and I noticed they are very different and it is pretty difficult to sub one for another in the low carb recipes.

A sugar-free, grain-free, keto lava cake you will love

The Keto Lava Cake will embrace your tastebuds. It’s a moist, very sweet, fluffy, creamy and warm lava cake.

This recipe doesn’t require any kind of low carb flours. You can serve it plain, straight out of the oven or add a scoop of your favorite ice-cream.

Most ice-cream on the market are 4g of carbs per a huge scoop (make sure you read labels). The best option would be to make low carb ice-cream at home.

Imagine the molten center of the lava cake and the melty vanilla ice cream joining together to bring you happiness.

Probably one of the best keto desserts you have ever eaten. It will definitely be loved by all the non-keto members of the family or friends. This keto lava cake satisfies a sweet tooth better than any other sweet dessert.

Ingredients for the keto lava cake

You will only need a few simple low carb ingredients:

  • 4 tbsp cocoa powder
  • 2 eggs
  • 3 tbsp heavy whipping cream
  • 3 tbsp sweetener (erythritol)
  • 1 tsp vanilla extract
  • 1/2 tsp baking powder
keto lava cake low carb ingrediets

How to make keto lava cake?

  1. The instructions are very simple. Mix all the ingredients until a slightly thick batter is formed.
  2. Bake in the preheated oven for 10-12 minutes or just until the top of the cake looks set.
  3. Remove from the oven and serve with whipped cream or vanilla ice-cream.
keto lava cake mix dry ingredients

If you make the recipe I would be delighted to see how your lava cake turned out!

Frequently asked questions

What is keto lava cake?

Keto Lava cake is a low-carb dessert made with cocoa powder instead of wheat flour and keto-approved sweetener instead of the white unhealthy sugar. It is tasty, moist and creamy.

Can the keto lava cake be dairy-free (paleo)?

Yes, just use unsweetened canned coconut milk instead of the heavy whipping cream.

How many carbs are in the low-carb lava cake?

One lava cake has a total of 8g of carbs, but only 4g NET carbs.

  • Calories: 192kcal
  • Carbs: 8g
  • Net Carbs: 4g
  • Protein: 9g
  • Fat: 15g
  • Saturated Fat: 8g
  • Fiber: 4g

To find out the NET carbs just subtract the fiber grams from the total carb count.

How many servings are in this keto dessert recipe?

The recipe yields 2 servings. One serving is an entire lava cake.

keto lava cake serving size

The Best Keto Lava Cake – Low Carb Molten Mug Cake with only 4g Carbs

3.65 from 359 votes

Prep time 5 mins
Cook Time 12 mins
Yelds 2 lava cake


With only 5 ingredients, you can make the perfect keto dessert. This low carb keto lava cake is a moist, very sweet, fluffy, creamy and warm lava cake. Super easy to make it will impress everyone and satisfy sweet cravings for unhealthy high-carb desserts. Serve it with low carb ice-cream.



  • Preheat oven to 350F°/180°C. Grease 2 ramekins with butter and set aside.
  • In a bowl combine the dry ingredients: cocoa powder, sweetener, baking powder.
  • In a separate bowl beat well the eggs with a fork. Add the heavy whipping cream, vanilla extract and mix again.
  • Add the egg mixture to the dry ingredients and combine together until you get a pourable consistency.
  • Bake for 12 minutes or until the top is set but still moist.
  • Turn out onto plates and serve hot!



  1. Make sure you are using high-quality unsweetened cocoa powder.
  2. If you want to serve your lava cake on a plate, make sure you are greasing very well the ramekins.
  3. Try not to overbake the lava cake, to get the gooey pudding texture.
Nutrition Facts
Amount per serving.
Total Carbs
Net Carbs

How do we calculate the nutrition info?

These nutrition facts listed are determined using nutrition information from the USDA Food Database. Our nutrition facts are accurate, but if you are using different products, please make your calculations. Net carb count is calculated by subtracting both fiber and sugar alcohols because they don’t raise blood sugar.

Course Keto Dessert
Cuisine American, Ketogenic Recipes
Keyword keto lava cake, low carb lava cake
Tried this recipe?Mention @LowCarbSpark or tag #LowCarbSpark!
The Best Keto Lava Cake - Low Carb Molten Mug Cake with only 4g Carbs


The full recipe is in the recipe card below. Readers that love this aslo made these recipes:


Ioana is a food and travel lover. Her greatest passion is developing mouthwatering recipes that are comforting, easy to make, and budget friendly! She firmly believes that cooking should be fun! About me...

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Recipe Rating

  1. Instructions don't mention where you add the cream or vanilla. I assume you mix it with the eggs, but you might want to explicitly state this.

    1. I just made in the microwave. Started with 90 seconds and then did 15 second intervals until it was cooked but still a bit gooey. It turned out great!

  2. Is it really supposed to have 1 tablespoon of vanilla? Mine turned out so bitter that I had to throw it out. Such a waste of of good vanilla.

    1. What sweetener are you using? Some of them turn out so bitter when baking them. Or maybe you used a stronger vanilla extract and it may need less depending on the quality of the product. Always taste the batter and adjust the ingredients.

    2. 5 stars
      Patti, I am so sorry it didn't work out for you. I just finished making some for me and for my daughter who are on keto, and they were absolutely delicious. In my experience with baking, what makes things bitter based on all the ingredients listed would be the cocoa powder. If you did not use a high-quality cocoa powder, or if you accidentally use just a little too much, or if you used dark instead of the regular, that will definitely cause your recipe to be bitter.

    1. It's a homemade low carb ice cream recipe I found on Pinterest. There are also a few low carb ice-creams you can find at the store, but you have to carefully read the ingredient lists to make sure they are keto friendly.

  3. For the sweetener is it possible to replace with the organic stevia? And how much? TIA! Looks so yummmy!

    1. Hello and thanks for your kind comment. I'm not sure about this because stevia sweetness differs from brand to brand. I am not a huge fan of how stevia tastes in baked goods.

  4. could anyone please tell me how much fat is in this marvelous recipe. I have a hard time eating enough fat.. the carbs are listed but not the fat intake.. Thanks Debbie

    1. Hi Jill!
      You can use the same batter. Spoon into the muffin pans, filling each cup about 2/3 full. You will have to cut the baking time in half.

  5. This was super rich and delicious!! I had to remember to only eat half for my one serving! For those who got a bitter taste, try using 3 1/2 Tablespoons of Whole Earth brand (keto). I also cooked mine for about 18 minutes in my Breville at 350 set on the convection setting as well…I had a very slightly crispy top and as the cake started to settle, the middle thickened into a pudding…I made my own whip cream by using 1/2 cup heavy whipping cream and 1 tsp maple extract. Cravings vanquished – incredible!

  6. Mighty good cake for sliced fresh strawberries! Topped with whipped cream of course. I bake at 400 for 9 minutes. Finishes setting up out of the oven. Perfect.


  7. I made this and it was delicious! My husband was very impressed he couldn’t believe it was sugar free and 4 grams or carbs. We had dessert first! Haha yum!

    1. Wow! I am super happy you both loved my recipe! It's indeed an excellent keto dessert. Everyone in my family loves it too!

    1. Hello Randy! There's a print button in the recipe card. Just scroll until you get to it. I guess you'll have to use a computer. Thanks for stopping by!

  8. Someone has to tell me where I went wrong mine taste terrible. The only thing I'm thinking it could be is Stevia packets…. I reduced the vanilla from 1tbsp to one 1tsp and it was still VERY bitter. I have this twice and both times it was horrible. Once exactly by the directions and the other reducing vanilla…. Stevia can't be that bad with baking right? (New to Stevia/low cal sweetener)

    1. Hello dear. I don't use stevia for baked goods. It gives them an extremely bitter taste, it tastes almost like metal. I am not a fan of stevia, I use erythritol instead. Monk fruit sweetener is also great for baked goods.

  9. Loana, I only have Hershey's cocoa. Is that a sufficient choice for cocoa? Also, I only have Swerve sugar. Do you have any idea if that sugar supplement works well in baked goods? Thanks for your time,

    1. Hello Tina. Swerve is perfect for as a low carb sweetener for baked goods. And the Hershey's cocoa is good as long is unsweetened (has no sugar added). If you try the keto lava cake, let me know how it turned out!

  10. 5 stars
    I just made this as a treat for my husband and I and I must say I was VERY skeptical but they were so yummy!! I used two tablespoons of monk fruit and a few drops of liquid stevia. I also only used one teaspoon of vanilla (because I totally read the recipe wrong ) and they were really good. Thank you!!

  11. I just made this and it was phenomenal. I calculated macros for my particular ingredients used and it came out to be 1.2g net carbs per serving. I ended up serving it with a small scoop of no sugar added vanilla ice cream and drizzling with some all-natural peanut butter. My husband gobbled it up in no time. I would recommend this recipe to anyone!

  12. Quick question, before I make this, are you using the words cocoa powder and cacao powder interchangeably? I have both, which one should I be using? Thanks so much!

  13. 5 stars
    My new favorite cake recipe. Was a little surprised that there is no flour in it. I microwaved it for 60 seconds like stated in a previous comment. It puffed up and was so moist, chocolately and sweet. I added a few sugar free chocolate chips on top. Delicious! Next time I will try to bake it. Definitely a keeper for recipes . Thanks for sharing.

  14. Hello, I would like to make these for a Christmas party THIS Tuesday! My question is….can I make the batter ahead and put in ramekins (or mason jars?) and store in fridge the evening before and then bring to room temp (or not?) and bake on Tuesday??

    1. I haven't tried making the batter ahead for the keto lava cake. I guess it should work though. It takes like 5 minutes to combine all the ingredients. If you try it let me know how it turned out 🙂

  15. I tried this recipe. The text is very good, but next time i would def add at least 1/4 teaspoon od salt. The taste was a little flat tasting. The touch of salt will make it perfect! Thanks for the recipe!

  16. This lava cake is to die for! I ended up cooking an additional 6 minutes but 5 probably would have been best. This is the easiest recipe ever! Tonight I’ve added Saigon cinnamon to the mix and sprinkled with chopped pecans before baking. It’s in the oven now. It’s gonna be fantastic! Hubby loves it too!

  17. 5 stars
    This recipe is so so so fantastic! This is going to make keto so much easier!
    I’ve tried a few desserts and nothing has come close to this good. It tastes like the real thing!
    I did use 1 tbs Vanilla & Swerve sugar.
    Thank You

  18. I’ve made this a few times. I use half the sweetener called for, When I pull it out, I break off just a small piece of 70% dark cocoa bar, & stick it in the warm center. It melts & adds that little touch of sweetness. Delicious!

    1. You can give it a try. I am curious if it gives a bitter taste. Let me know how it turned out and if that worked fine, what brand of stevia-sweetened cocoa you’ve used.

  19. 4 stars
    I really think the taste of this is delicious. I had some issues with the baking time, though. I used glass Pampered Chef bowls as the baking vessels (two of them). I think after 20 min, I took them out and didn’t think they were set. I ended up putting them 5 more min and just ate it as is. I used a teaspoon of high quality vanilla, 1 tbsp erythritol and 2 tbsp of monk fruit sweetener- I like the two and didn’t know which I wanted to use. It’s very reminiscent of a good dark chocolate. It just never really set the way I wanted it to. I’ll definitely keep trying to tweak the recipe.

    Also, in Carb Manager, I listed all ingredients used and called it two servings since it was in the two dishes. Honestly, with the two sweeteners that don’t impact blood sugar, I can totally eat both servings and stay under my macros!!! This is wonderful. Thank you for the recipe!

  20. Amazing! So happy to find a quick easy dessert that I can enjoy. My nonketo boyfriend even likes it!
    I did change the sweetener and use half monk fruit the second time I made it and I found it made it a little less bitter.
    Thanks for the yummy recipe!

  21. 5 stars
    I noticed that there’s not any Almond or Coconut flour in this recipe. Is it flour free, or just a type O’? I’ve never made a cake recipe without some type of flour. I always substitute Almond and/or Coconut flour for all purpose flour in my recipes calling for regular flour . I’m excited to try your recipe! Thanks for sharing it with us. Debbe’

  22. 5 stars
    This is BY FAR the best keto dessert I’ve EVER made!! (and I’ve made a lot of them) The baked part was great, the molten middle was like warm pudding. Ate it with a small scoop of keto ice cream. I probably needed to bake it a little longer…. but even though it was mostly molten it was still delicious. Also… I used 2 tbsp lankanto monk fruit sweetener and 5 drops of glycerite … it was perfect

About me

Hello! My name is Ioana Borcea, and I'm here to provide you with mouthwatering recipes. This blog is all about sharing my favorite tested easy to make, delicious low-carb & keto, nutrient-dense recipes.

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