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Easy 5-Minute Keto Lemon Mug Cake

Keto Recipes Low Carb

Easy 5-Minute Keto Lemon Mug Cake


This keto lemon mug cake is ready in only a few minutes and will leave you satisfied and satiated with only 3.1g net carbs per serving!


 2 tbsp (0.5oz/16g) finely ground almond flour
 2 tbsp (0.5oz/16g) finely ground coconut flour
 2 tbsp (1oz/28g) granulated erythritol
 1 egg
 1 tbsp (15ml) unsweetened almond milk
 1 tbsp (15ml) melted butter or coconut oil
 1 tbsp (15ml) lemon juice
 1 drop lemon flavoring (optional)
 ½ tsp (gluten-free) baking powder
Optional: Lemon Icing
 2 tbsp (0.3oz/12g) powdered erythritol
 1 tbsp (15ml) heavy cream
 1 tsp (5ml) lemon juice


1: Add all of the ingredients except for the ingredients for the optional lemon icing into a middle-sized bowl.

Whisk until you get a smooth and chunk-free dough.

2: Grease your microwave-safe mug or ramekin with cooking oil that doesn’t have a strong taste (I like to use coconut oil, butter or avocado oil).

3: Add your cake batter into your mug or ramekin (the mug should be at least double the size of the mixed ingredients).

Instructions: Microwave

4: Microwave for about 1-3 minutes.

(The cooking time in your microwave may vary heavily depending on what microwave and what settings you’re using.)

A broad rule of thumb: Approx. 1 Minute at 1200 Watt and more like 2-3 minutes at <600 Watt.

If you don’t know the Wattage power of your microwave I’d recommend baking your mug cake for a shorter time period (60 seconds) first and continue baking for a few more seconds if needed.
This will avoid that the mug cake dries out.
You can test if your mug cake is completely cooked by pricking the center with a toothpick – if it comes out “clean” it’s ready!

Instructions: Oven

5: Preheat your oven to 350 degrees Fahrenheit (180°C).

Follow the same steps as above.
Bake your mug cake for about 10-15 minutes.
You can test if your mug cake is completely cooked by pricking the center with a toothpick – if it comes out “clean” it’s ready!

(Optional) Prepare the Lemon Icing:

6: Mix the powdered erythritol, lemon juice, and heavy cream and pour it over the finished keto lemon mug cake.

7: Enjoy warm or cold, both options taste great!

8: Cover with plastic wrap and store for up to 2 days in your fridge.

Nutrition Facts

Serving Size 1/2 mug cake

Servings 2

Amount Per Serving
Calories 171
% Daily Value *
Total Fat 12.7g20%Total Carbohydrate 7.6g3%

Dietary Fiber 4.5g18%

Protein 8.9g18%

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