Keto Lemon Cake
Keto Recipes


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Delight your taste buds with a harmonious blend of sweet and tart flavors in this extraordinary low-carb and gluten-free Keto Lemon Mug Cake. With a mere 4 grams of net carbs per serving, this indulgent treat is not only delicious but also guilt-free. Dive into the detailed process of creating this culinary masterpiece with the perfect balance of ingredients.

Ingredients for Keto Lemon Mug Cake:

Almond flour – Opt for a super-fine grind to enhance the texture.

Coconut flour

Baking powder

Butter – Choose salted butter, or add a pinch of salt for unsalted butter.

Egg – Just one egg is all you need.

Brown sugar substitute – Use your preferred brand.

Lemon juice – Freshly squeezed for that zesty kick.

Lemon zest

How to Make:

Prepare the Dry Ingredients: In a small bowl, meticulously combine the almond flour, coconut flour, and baking powder. Ensure an even distribution for the perfect texture in your mug cake.

Create the Wet Mixture: In another small bowl, blend the melted butter, egg, freshly squeezed lemon juice, and lemon zest. This concoction will infuse your mug cake with rich flavors and moisture.

Unifying Wet and Dry Elements: Merge the wet and dry ingredients, achieving a smooth batter. Avoid overmixing, allowing small lumps to maintain the cake’s texture.

Prepare the Mug: Coat the insides of a large mug with butter, ensuring a seamless release once the cake is cooked.

Bake in the Microwave: Transfer the batter into the prepared mug and microwave on high for approximately 90 seconds. Keep an eye on the cake’s progress, ensuring it rises without overflowing.

Check for Doneness: Insert a toothpick or thin knife into the center to check for doneness. Clingy crumbs are acceptable, but no raw batter should be visible. If needed, give it an additional 10-15 seconds.

Garnish and Serve: Elevate your Keto Lemon Mug Cake by garnishing with whipped cream and a sprinkle of lemon zest. Indulge in the delightful flavors you’ve crafted.

Tips for Success:

Start with a larger mug to accommodate the cake’s expansion during cooking.

Avoid overmixing to maintain the desired texture.

Store any leftovers in an airtight container in the fridge for 2-3 days. Reheat gently in the microwave when ready to enjoy.

Frequently Asked Questions (FAQs):

Is This Mug Cake Vegan?

No, this recipe contains an egg and a frosting made from heavy whipping cream, a dairy product.

How Many Carbs Does the Frosting Add?

The frosting, made with ½ tablespoon of heavy whipping cream, Swerve sweetener, and lemon juice, adds minimal net carbs.

Can You Add Cream Cheese To The Mug Cake?

While the recipe doesn’t include cream cheese in the cake, you can add a low-carb cream cheese frosting on top for a delicious twist.

Can I Make The Mug Cake With Coconut Flour?

It is not recommended to substitute coconut flour for almond flour, as coconut flour absorbs more moisture.

What Is The Best Dish To Use In The Microwave?

Any microwavable dish works, preferably a mug or a small ramekin that holds around 8-10 ounces of liquid.


Recipe by
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Course: Keto RecipesCuisine: American


Prep time


Cooking time






  • 2 tablespoons almond flour

  • 1 tablespoon coconut flour

  • 1/2 teaspoon baking powder

  • 1 tablespoon salted butter

  • 1 egg

  • 2 teaspoons brown sugar substitute

  • 1 teaspoon lemon juice

  • 1 teaspoon lemon zest


  • Mix the Dry Ingredients: In a small bowl, combine almond flour, coconut flour, and baking powder.
  • Create the Wet Mixture: In another small bowl, blend melted butter, egg, lemon juice, and lemon zest.
  • Unify Wet and Dry Ingredients: Combine the wet and dry mixtures, ensuring a smooth batter.
  • Prepare the Mug: Butter the insides of a large mug.
  • Microwave: Pour the batter into the mug and microwave on high for about 90 seconds.
  • Check for Doneness: Insert a toothpick to check for doneness. If needed, microwave for an additional 10-15 seconds.
  • Serve and Enjoy: Indulge in your delightful Keto Lemon Mug Cake!

Nutrition Facts

  • Calories: 250kcal
  • Carbohydrates: 5g
  • Protein: 9g
  • Fat: 23g
  • Fiber: 2g
  • Sugar: 1g

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