This keto mug cake is the perfect quick dessert for when chocolate cravings hit. Ready in just 90 seconds, this single-serve treat is sugar-free, moist, rich, and fluffy—all with only 4 grams of net carbs. Made with coconut flour, it delivers an insanely chocolatey flavor while staying completely low carb and keto-friendly.
Calling out all my chocolate lovers out there? It’s probably obvious that I’m a huge chocolate fan and I’m always craving my keto brownies, keto chocolate cake, or coconut flour chocolate cake.
When those sudden chocolate cravings strike, I turn to the easiest low-carb chocolate dessert: this super moist keto mug cake. Ready in under 5 minutes, it’s a recipe you’ll make again and again. With its rich, brownie-like texture and wholesome keto-friendly ingredients, this sugar-free mug cake feels indulgent while staying perfectly on plan.
Why This Is the Best Keto Mug Cake Recipe
- Ready in just 60 seconds – The ultimate quick dessert for when you need instant chocolate satisfaction.
- Super fluffy, moist cake texture – You’d never guess it’s made with coconut flour and is completely low carb.
- The perfect sweet tooth fix – Rich, chocolatey, and satisfying without the sugar spike.
- Made with simple, pantry-friendly ingredients – Everything you need is likely already in your keto kitchen.
- Customizable to your cravings – Add sugar-free chocolate chips, nuts, peanut butter, or even a sprinkle of sea salton top.
- Portion-controlled dessert – No leftovers, no temptation—just the perfect single serving.
- Gluten-free and sugar-free – Ideal for anyone following a low-carb lifestyle or gluten-free diet.
How To Make Keto Mug Cake
Ingredients You’ll Need
If you crave a quick low carb dessert, this keto chocolate mug cake is here for you and ready in 90 seconds.
Try this rich and chocolatey mug cake that can also be paleo friendly. Just replace the whipping cream with coconut milk (the canned one), and it turns out perfectly. If you prefer, use coconut sugar instead of erythritol.
You’ll see that instead of wheat flour, I use a blend cocoa powder and coconut flour.
This keto mug cake is almond-free, making it perfect for anyone with nut allergies. Plus, coconut flour is budget-friendly, lower in carbs, and adds great texture to the cake.
- Cocoa powder – Use a high-quality unsweetened cocoa powder for the best flavor. The richer the cocoa, the more indulgent your low-carb chocolate mug cake will taste.
- Coconut flour – Provides structure, keeps the cake low carb, and adds fiber. It’s also more affordable than almond flour.
- Sweetener – Adjust to taste. I use erythritol, but stevia or monk fruit sweetener also work well.
- Egg – Binds ingredients together and adds moisture. For the best results, use room-temperature eggs.
- Heavy cream – Adds extra richness and a creamy texture to the keto microwave cake.
- Baking powder – Helps the cake rise, creating that perfect fluffy texture.
- Vanilla extract – Enhances flavor and gives the mug cake a warm, sweet aroma.
- Sugar-free chocolate chips (optional) – I recommend Lily’s chocolate chips for a keto-friendly option, or chop up 85% dark chocolate for a richer flavor.
Make The Keto Mug Cake Batter
The method for the mug cake is effortless. All you have to do is to check your pantry and fridge to see if you have all the ingredients. Then follow the steps, and you’ll have a beautiful, decadent cake that screams on an excellent keto ice cream on top.
In a medium bowl, whisk together the egg, heavy whipping cream, melted coconut oil (or butter), salt, and vanilla extract.
Add the dry ingredients: cocoa powder, coconut flour, erythritol, and baking powder, and mix well with a spatula until smooth.
Transfer the batter to a greased mug. Top it with unsweetened chocolate chips (optional).
Cooking The Keto Mug Cake
Microwave on high for 90 seconds. Be aware that cooking time can vary depending on your microwave. My keto mug cake is perfect after exactly 90 seconds at 800W (max temp.).
Enjoy the keto mug cake with a cup of keto coffee for breakfast!
Tips for Making the Best Keto Chocolate Mug Cake
- Don’t overcook – This keto mug cake needs less than 90 seconds in the microwave. Microwave ovens vary in power, so check at the 60-second mark to avoid a dry or rubbery texture.
- Oven option – If you prefer not to use the microwave, bake at 350°F (180°C) for about 10 minutes, or until set.
- Use the right mug size – Choose a 6–8 ounce microwave-safe mug. The batter will rise as it cooks, so make sure there’s enough room.
- Measure ingredients accurately – Coconut flour recipes require precise ratios for the right texture and flavor. Use proper measuring spoons and cups.
- Avoid over-mixing – Mix the batter just until combined. Over-mixing can make the mug cake dense rather than light and fluffy.
- Egg-free option – Use a vegan egg substitute (like flax egg or chia egg) to make an egg-free keto mug cake.
- Flavor boost – Stir in one tablespoon of peanut butter or almond butter before cooking for extra richness.
- Dairy-free option – Replace heavy cream with coconut cream and butter with coconut oil for a dairy-free keto chocolate mug cake.
This keto chocolate mug cake is not only delicious but also packed with healthy fats, fiber, and protein to keep you satisfied and on track with your low-carb diet. So next time you have a sweet tooth, skip the processed and high-carb desserts and make this easy and guilt-free Keto Chocolate Mug Cake in just 90 seconds!
How to Store Keto Chocolate Mug Cake
The keto chocolate mug cake is best enjoyed fresh, as the texture is soft, fluffy, and rich right after cooking. However, if you have leftovers, you can still store and reheat them with good results:
- Cover the mug – Wrap the mug with plastic wrap or cover it with a lid to prevent the cake from drying out.
- Refrigerate – Store in the refrigerator for up to 2 days.
- Reheat gently – When ready to enjoy, microwave for 15–20 seconds until warm.
Note: The texture may become slightly more dense after refrigeration and reheating, but it will still taste delicious.
More Keto Chocolate Desserts
- Keto Chocolate Muffins
- The Best Keto Chocolate Cake
- Easy Keto Chocolate Frosting (5 Minute Recipe)
- The Best Chocolate Keto Lava Cake – Only 3g Carbs
Chocolate Keto Mug Cake Recipe
Description
Ingredients
- 2 tbsp butter melted, or coconut oil
- 2 tbsp cocoa powder
- 2 tbsp coconut flour
- 2 tbsp sweetener
- 2 large egg room temperature
- 2 tbsp heavy cream or canned coconut cream
- 1/2 tsp baking powder
- 1 tsp vanilla extract
- pinch salt
- 1 tbsp chocolate chips unsweetened, optional
Instructions
- In a medium bowl whisk together the egg, heavy whipping cream, melted coconut oil (or butter), salt, vanilla extract.
- Add the dry ingredients: cocoa powder, coconut flour, erythritol, baking powder and mix well with a spatula until smooth.
- Transfer the batter to a greased mug. Top it with unsweetened chocolate chips (optional).
- Microwave on high for 90 seconds. Be aware that cooking time can vary depending on your microwave. My keto mug cake is perfect after exactly 90 seconds at 800W (max temp.).
Notes
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.