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Keto lemon mug cake in a clear glass mug with a spoon to the side.
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5 from 5 votes

Keto Lemon Mug Cake

Rich, moist, and lemony, this easy-peasy keto Lemon Mug Cake is a terrific dessert that's designed for one! Low in net carbs and ready in under 5 minutes, indulge today!
Prep Time2 minutes
Cook Time1 minute
Total Time5 minutes
Course: Desserts
Cuisine: American
Keyword: easy keto lemon cake, keto lemon mug cake, keto microwave cake, low-carb mug cake, single-serving keto dessert
Servings: 1
Calories: 250kcal
Author: Chef Jenn

Ingredients

  • 2 tablespoons almond flour
  • 1 tablepsoon 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

Instructions

  • Mix the dry ingredients in a small bowl.
  • Mix the melted butter, egg, lemon juice, and lemon zest in another small bowl.
  • Mix the wet and dry ingredients together.
  • Butter the insides of a large mug.
  • Add the batter to the mug and microwave it on high for about 90 seconds.
  • Check if your mug cake is done, then dig in!

Notes

Recipe Card Tips

  • Use a mug that looks too big for the batter. It roughly doubles in size as it cooks, and an undersized mug means overflow in the microwave.
  • Stop mixing as soon as the batter comes together. A few small lumps are fine, and overmixing is the most common reason a mug cake turns dense instead of tender.
**please note that the sugar alcohols from the sugar substitute are not calculated in this recipe because they have no calories and no carbs.

Nutrition

Serving: 1cake | Calories: 250kcal | Carbohydrates: 5g | Protein: 9g | Fat: 23g | Saturated Fat: 9g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Trans Fat: 0.5g | Cholesterol: 194mg | Sodium: 367mg | Potassium: 73mg | Fiber: 2g | Sugar: 1g | Vitamin A: 589IU | Vitamin C: 5mg | Calcium: 178mg | Iron: 2mg | Net Carbohydrates: 3g