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What do you do when you need a healthy dessert, like NOW? Make this low carb keto chocolate mug cake recipe! This easy keto mug cake (seriously, it takes 2 minutes!) will save the day to satisfy all of your chocolate cravings. It’s rich and chocolaty and moist… and it’s made with nutritious ingredients, so you can even start your day off with it as a chocolate keto breakfast. Plus, I love that it’s a single serving – great for portion control!

Of course, if a chocolate mug cake isn’t your thing, I hope you’ll at least try my other keto mug cake recipes. The cinnamon flax seed muffin in a mug and vanilla mug cake are both popular alternatives, and there’s also an angel food mug cake in The Easy Keto Cookbook.

If you’re a chocolate lover like me, though, you have to try this version. It’s one of my favorite keto recipes and will really hit the spot for that chocolate fix.

What Is Mug Cake?

Keto chocolate mug cake is a single-serve chocolate cake made in a mug. It’s traditionally cooked in the microwave for a healthy dessert that’s ready in minutes, but you can also bake it in the oven if you like.

Why You’ll Love This Keto Chocolate Mug Cake Recipe

  • Sweet, chocolaty taste
  • Rich and moist cake texture
  • Quick and easy to make
  • Sugar-free, gluten-free, and grain-free, with dairy-free and paleo options
  • Just 4 grams net carbs in a large serving
  • Healthy treat ready in less than 5 minutes
Keto mug cake in a clear mug

Ingredients You’ll Need

This section explains how to choose the best ingredients for low carb chocolate mug cake, what each one does in the recipe, and substitution options. For measurements, see the recipe card below.

  • Salted Butter – Personally, I prefer grass-fed butter for the best flavor, if that works for you, but dairy-free options are listed below. If all you have is unsalted butter, you can use that and just add a pinch of salt.
  • Unsweetened Baking Chocolate – This makes for a more moist mug cake than using cocoa powder. We are adding sweetener separately, so make sure this is 100% unsweetened baker’s chocolate, not a sweetened sugar-free chocolate.
  • Wholesome Yum Blanched Almond Flour – The main flour I use in almost all my keto baked goods, because it produces such a great texture. Don’t use almond meal or coconut flour, it won’t turn out. If you need substitution options, see below.
  • Besti Monk Fruit Allulose Blend – Besti is my favorite sugar substitute! The original version of this recipe used erythritol, but the monk fruit allulose blend makes a far superior, super moist mug cake. Paleo followers may prefer to use coconut sugar for the sweetener.
  • Baking Powder – Make sure it’s fresh so that your cake rises well, and if it’s important to you, double check that it’s gluten-free.
  • Egg – You’ll need one whole, large egg.
  • Vanilla extract – Optional, but highly recommended for the best flavor.

Substitution Options

There are also some substitution alternatives, depending on your needs.

  • Keto Mug Cake Without Milk – Unlike many other chocolate mug cake recipes, this one has no milk. Don’t worry – it’s not dry at all! The butter and chocolate in there keep it ultra moist. In fact, it’s probably the moistest chocolate mug cake I’ve ever had.
  • Dairy-Free Keto Mug Cake – If you need the keto chocolate mug cake to be completely dairy-free, you can replace the butter with ghee or coconut oil. When you substitute one of these, just add a pinch of salt to compensate for the salted butter.
  • Nut Free Option – Don’t replace the almond flour with coconut flour, as the batter would be way too dry. If you need a nut-free option, you can substitute sunflower seed flour for the almond flour, though almond flour does produce a better flavor and texture.
Keto chocolate mug cake ingredients

How To Make Keto Mug Cake With Almond Flour

This section shows how to make keto chocolate mug cake, with step-by-step photos and details about the technique. For full instructions, see the recipe card below.

The original recipe for how to make chocolate mug cake uses the microwave, making it ultra fast to prepare. If you prefer the oven, no problem! We’ll cover both ways, so you can decide what is best for you.

Microwave Method:

  • Melt the butter and chocolate. You can make your keto chocolate cake in a mug or in a ramekin, and melt the butter and chocolate right in there.
Melted butter and chocolate in a mug
  • Mix up the batter. Stir in almond flour, Besti, baking powder, egg, and vanilla with a spoon or fork.

TIP: Be sure to mix well. I mix in the same mug for convenience, but if you want to be extra sure, you could whisk the dry ingredients separately first in a small bowl, and then add to the mug.

Keto mug cake batter with almond flour in a mug
  • Cook. Microwave the mug cake for 60-75 seconds, until just firm.

TIP: This last step is really the only “trick” to the recipe. As long as you don’t overcook your low carb chocolate mug cake, it won’t be dry! You want it to be spring-y, but not dry.

  • Serve. See below for topping ideas!

Oven Method:

  • Preheat the oven to 350 degrees F.
  • Melt the butter and chocolate. Melt the butter and chocolate together in a double boiler.
  • Mix up the batter. Stir in the almond flour, Besti, baking powder, egg, and vanilla.
  • Bake mug cakes. Transfer batter into ramekins and bake for about 15 minutes.

TIP: You’ll need either a large 12-oz ramekin or two small 6-oz ramekins. Make sure your ramekins are a lot bigger than the volume of the batter (about double the size), because the cake will rise as it’s baking.

Finished low carb mug cake with whipped cream and chocolate drizzle on top

Toppings For The Best Chocolate Cake In A Mug

It’s delicious on its own, but my favorite way to enjoy this delicious mug cake is to add toppings. For the ultimate keto mug cake, top it with:

  • Keto Whipped Cream – Make it with or without sweetener.
  • Melted Chocolate – The batter for the keto mug cake uses unsweetened baking chocolate, but for topping I recommend sugar-free chocolate chips, which are sweetened.
  • Chopped Nuts – Any kind of keto nuts will work, such as walnuts, pecans, or almonds. You can also stir them into the batter.
  • Keto Vanilla Ice Cream – My favorite topping!
  • Peanut Butter Drizzle – Microwave some peanut butter with a bit of coconut oil, then drizzle over the cake.
  • Berries – Chopped strawberries, raspberries, blueberries, or blackberries are all keto friendly.

Storage Instructions

  • Store: If you find yourself with some extra low carb chocolate mug cake (I don’t know how this would happen!), you can store it at room temperature for a day, or in the fridge for 2-3 days. You can store these keto mug cakes right in the mugs if you like, by just covering with plastic wrap. It’s really best fresh, though.
  • Reheat: It’s fine to eat the mug cake cold or at room temperature, but if you want to heat it, you can microwave it again. It can help to spread a thin layer of butter on top before reheating, to prevent drying out.
  • Freeze: Wrap tightly in plastic wrap and store in the freezer. Let it thaw in the fridge and then re-heat in the microwave or oven until just warm.

I don’t recommend making the mug cake batter ahead of time. The melted butter and chocolate will solidify as they cool, and the baking powder will lose its effectiveness if it sits with the wet ingredients for too long without cooking.

Keto mug cake recipe in a glss mug with whipped cream on top

Keto Mug Cake Variations

If you like this chocolate keto mug cake, try these variations of other mug cakes:


Reader Favorite Recipes

The recipe card is below! Readers that made this also viewed these recipes:

Keto Chocolate Mug Cake Recipe

An EASY keto mug cake recipe in just 2 minutes, with 6 ingredients + 4g net carbs! This low carb chocolate mug cake is rich, moist, sweet, sugar-free, and gluten-free.

Prep Time 2 minutes

Cook Time 2 minutes

Total Time 4 minutes

Servings 1 mug cake

Recipe Video

Tap on the image below to watch the video.

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Keto Sweeteners


Tap on the times in the instructions below to start a kitchen timer while you cook.

Microwave Instructions

  1. Melt the butter and chocolate together in a mug or large 12 oz (355 mL) ramekin in the microwave (about 45-60 seconds, stirring halfway through). Be careful not to burn it. Make sure the ramekin is at least double the volume of the ingredients, because the mug cake will rise.

  2. Add the almond flour, sweetener, baking powder, egg, and vanilla (if using). Stir everything well until completely mixed together.

  3. Microwave for about 60-75 seconds, until just firm. (Don’t overcook, or it will be dry.)

  4. Serve with whipped cream (or coconut whipped cream for paleo), and/or drizzle with more melted chocolate stirred with sweetener.

Oven Instructions

  1. Preheat the oven to 350 degrees F (177 degrees C).

  2. Melt the butter and chocolate together in a double boiler on the stove. Be careful not to burn it. Remove from heat.

  3. Add the almond flour, sweetener, baking powder, egg, and vanilla (if using). Stir everything well until completely mixed together.

  4. Transfer the batter to a large 12 oz (355 mL) oven-safe ramekin (or two smaller 6 oz (178 mL) ones). Make sure the ramekins are at least double the volume of the ingredients, because the cake will rise. Bake for about 15 minutes, until just firm.

  5. Serve with whipped cream (or coconut whipped cream for paleo), and/or drizzle with more melted chocolate stirred with sweetener.

Recipe Notes

Serving size: 1 mug cake (entire recipe)

Video Showing How To Make a Chocolate Mug Cake:

Tap here to jump to the video for this recipe — it’s located directly above the ingredients list. It’s the easiest way to learn how to make a Chocolate Mug Cake!

Nutrition Facts

Amount per serving. Serving size in recipe notes above.

Calories 433

Fat 38g

Protein 14g

Total Carbs 11g

Net Carbs 4g

Fiber 7g

Sugar 1g

Nutrition facts are provided as a courtesy. Have questions about calculations or why you got a different result? Please see our nutrition policy.

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Low Carb Paleo Keto Chocolate Mug Cake Recipe - 6 Ingredients | Keto chocolate mug cake is ready in just 2 min, using 6 ingredients! This low carb chocolate mug cake is paleo + gluten free w 4g net carbs! #wholesomeyum #lowcarb #keto #paleo #mugcake #chocolate