Name: Keto Chocolate Mug Cake
Prep time: 2 min
Cook time: 1 min
Total time: 3 min
Ingredients: 1 tbsp Butter (melted); 3 tbsp Almond Flour (or 1 tbsp Coconut Flour); 1 tbsp Unsweetened Cocoa Powder (or chocolate collagen powder); 2 tbsp Granular Sweetener (or 1 tbsp if you're using a drink mix because they're already sweetened); ½ tsp Baking Powder; 1 large Eggs; ½ tsp Vanilla Extract

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This keto chocolate mug cake is rich, chocolatey, and soft with a warm cake-like texture. It cooks right in the microwave, so it’s an easy option when you want a quick chocolate dessert.

keto chocolate mug cake in a glass mug with sugar free whipped cream and a strawberry

If you want another keto mug cake, try my keto peanut butter mug cake. For something you can make ahead, my keto chocolate mousse and chocolate chia seed pudding are easy chocolate options.

Ingredients Needed

Butter: Melt this directly in the mug before adding the remaining ingredients.
Almond flour: Gives the cake its soft texture. You can also use coconut flour, but you’ll need less.
Unsweetened cocoa powder: Adds the rich chocolate flavor. I sometimes use chocolate collagen powder instead when I want the chocolate flavor plus some extra protein.
Granular sugar substitute: Use your preferred sweetener that measures similarly to sugar.
Baking powder: Helps the cake rise as it cooks.
Egg: Gives the mug cake structure while keeping the center soft.
Vanilla extract: Rounds out the chocolate flavor.

How to Make a Keto Chocolate Mug Cake

Melt the butter

Add the butter to a 12-ounce microwave-safe mug and heat until melted.

Pour in the remaining ingredients

Add the almond flour, cocoa powder or chocolate collagen powder, sweetener, and baking powder. Add the egg and vanilla.

Mix

Whisk with a fork or small whisk until the batter is smooth, scraping the bottom and sides of the mug so no dry ingredients remain.

Microwave

Microwave for about 1 minute, or until the top is set and the center is still soft and cake-like.

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Tips for the Best Keto Mug Cake

Use a 12-ounce mug: This gives the cake enough room to rise without overflowing.
Mix thoroughly: Cocoa powder and almond flour can settle into the bottom corners of the mug.
Don’t overcook it: A dry or rubbery mug cake usually means it stayed in the microwave too long.
Adjust for your microwave: Use 1 minute as a starting point since microwave power can vary.

Almond Flour vs. Coconut Flour

I usually make this keto chocolate mug cake with almond flour, but coconut flour works too. Use:

3 tablespoons almond flour, or
1 tablespoon coconut flour

Coconut flour absorbs much more liquid, so the amounts are not interchangeable.

Chocolate Mug Cake Add-Ins

You can mix in a small amount of:

Sugar-free chocolate chips
Chopped pecans, walnuts, or almonds
Peppermint extract: Add a drop or two for a chocolate-mint version.
Chocolate collagen powder: I sometimes use this in place of the cocoa powder when I want the chocolate flavor plus extra protein.

A Keto Chocolate Mug Cake in a glass mug sitting next to a tub of Ancient Nutrition Keto Cocoa

Topping Ideas

Serve the mug cake warm as-is or add:

Homemade whipped cream
Sugar-free chocolate chips
Chopped nuts
A few berries

Keto Chocolate Mug Cake

This keto chocolate mug cake is a quick single-serving dessert made with almond flour, cocoa powder, and a sugar substitute. Mix everything in a mug and microwave until soft and cake-like.

Prep: 2

Cook: 1

Ready in: 3

Cuisine: American

Course: Dessert

Servings: 1

Author: Davinah

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Ingredients

▢ 1 tbsp Butter, melted
▢ 3 tbsp Almond Flour, or 1 tbsp Coconut Flour
▢ 1 tbsp Unsweetened Cocoa Powder, or chocolate collagen powder
▢ 2 tbsp Granular Sweetener, or 1 tbsp if you’re using a drink mix because they’re already sweetened
▢ ½ tsp Baking Powder
▢ 1 large Eggs
▢ ½ tsp Vanilla Extract

Instructions

Add the butter to a 12-ounce microwave-safe mug and microwave for 15 to 30 seconds, or until melted.
Add the almond flour, cocoa powder or chocolate collagen powder, sugar substitute, and baking powder. Add the egg and vanilla.
Whisk until smooth, scraping the bottom and sides of the mug so no dry ingredients remain.
Microwave for about 1 minute, or until the top is set and the center is soft and cake-like.
Add toppings, if desired, and serve warm.

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Recipe Notes

Use a 12-ounce microwave-safe mug.
Substitute 1 tablespoon coconut flour for the 3 tablespoons almond flour.
Chocolate collagen powder can be used in place of the cocoa powder.
Avoid overcooking since mug cakes can dry out quickly.
Microwave power varies, so use 1 minute as a starting point.
Optional add-ins include sugar-free chocolate chips or chopped nuts.

Nutrition Details

The nutrition facts come from entering the recipe ingredients into a database of food ingredients. They may vary for any recipe based on the exact product used.

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