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lemon blueberry keto mug cake in mug

How to Make the Best Lemon Blueberry Keto Mug Cake in 3 Minutes

This Lemon Blueberry Keto Mug Cake is a quick, bright, and sugar-free dessert made with almond flour, lemon juice, and juicy blueberries. Ready in just 3 minutes, it’s soft, zesty, and perfect for anyone craving a low-carb, gluten-free sweet treat. Inspired by Chef Rita’s cozy Oregon kitchen, this single-serve cake captures the sunny flavors of lemon and berries in one beautiful, keto-friendly mug.

  • Total Time: 3 minutes
  • Yield: 1 mug cake

Ingredients

Scale

1 large egg

5 tablespoons almond flour

1/2 teaspoon baking powder

1 1/2 tablespoons granulated Stevia or erythritol

2 tablespoons lemon juice

1 teaspoon lemon zest

2 tablespoons fresh blueberries

Instructions

1. Whisk egg, lemon juice, lemon zest, and sweetener in a small bowl until smooth.

2. Add almond flour and baking powder, stirring to combine.

3. Fold in blueberries gently to keep them whole.

4. Pour mixture into a tall microwave-safe mug, leaving space for rising.

5. Microwave on high for 90 seconds, or until firm to the touch.

6. Let cool for 1 minute before serving warm.

7. Top with sugar-free whipped cream, lemon glaze, or more fresh blueberries if desired.

Notes

For a dairy-free version, use coconut cream or vegan yogurt on top.

Add 1 teaspoon of poppy seeds for a bakery-style twist.

Bake at 350°F for 10 minutes if you prefer an oven-baked texture.

Inspired by my Keto Apple Mug Cake Recipe and Lemon Poppy Seed Mug Cake for flavor harmony.

  • Author: Rita
  • Prep Time: 1 minute
  • Cook Time: 2 minutes
  • Category: Healthy Mug Cakes
  • Method: Microwave
  • Cuisine: American