Name: Delicious Keto Blueberry Mug Cake with Lemon Zest
Prep time: 5 min
Cook time: 1 min
Total time: 6 min
Ingredients: 2 tbsp blanched almond flour; 2 tbsp coconut flour; ½ tbsp baking soda; ⅛ tbsp xanthan gum; 2 tbsp unsalted butter, melted but not hot; 1 egg; 2 tbsp sugar-free brown sugar(Swerve brand used); 2 tbsp blueberries; 1 tbsp grated lemon zest; 1 tbsp lemon juice

Contents hide

1 Keto Blueberry Mug Cake with Lemon Zest

1.1 Ingredients

1.2 Directions

2 Frequently Asked Questions

2.1 Can I make a Blueberry Mug Cake without eggs?

2.2 How do I keep my Blueberry Mug Cake from becoming rubbery in the microwave?

2.3 Is a Keto Blueberry Mug Cake healthy for weight loss?

3 Delicious Keto Blueberry Mug Cake with Lemon Zest

3.1 Ingredients

3.2 Equipment

3.3 Method

Image Credit – CJ Caldwell

Craving something sweet but sticking to your keto goals? Say hello to the ultimate guilt-free indulgence — the Keto Blueberry Mug Cake with Lemon Zest. This easy, single-serve dessert is packed with juicy blueberries, bright notes of lemon, and a moist, cake-like texture that’s ready in under five minutes. Whether you’re battling late-night cravings or just need a quick dessert fix, this microwave-friendly cake has your back. No complicated baking, no mess — just a wholesome, low-carb treat that satisfies both your sweet tooth and your macros. Plus, the lemon zest adds a refreshing twist that elevates the flavor to a whole new level.

This keto blueberry mug cake recipe is perfect for when sweet cravings hit, but you don’t have the time or energy to bake an entire cake. This single-serve mug cake is simple to make and requires only a few ingredients. Plus, you can manipulate it based on your cravings. Try swapping out the blueberries for raspberries or strawberries for a different flavor. Add in some keto-friendly chocolate chips if you are in the mood for chocolate!

Keto Blueberry Mug Cake with Lemon Zest

Prep Time 5 mins Cook Time 1 min Total Time 6 mins

Ingredients

2 tbsp blanched almond flour
2 tbsp coconut flour
½ tsp baking soda
⅛ tsp xanthan gum
2 tbsp unsalted butter, melted but not hot
1 egg
2 tbsp sugar-free brown sugar(Swerve brand used)
2 tbsp blueberries
1 tsp grated lemon zest
1 tsp lemon juice

For Garnish:

1 tsp powdered erythritol

Directions

In a small bowl, sift together the almond flour, coconut flour, baking soda, and xanthan gum.
In another small bowl, mix together the butter, egg, and brown sugar until thoroughly combined.
Pour the wet ingredients into the dry ingredients and mix until homogenous. Fold in the blueberries, lemon zest, and lemon juice, then transfer the batter to a 10-to 12- ounce microwave-safe serving dish. Cover with plastic wrap and microwave on high for 1 minute.
Remove your keto blueberry mug cake from the microwave.
Option to garnish the keto blueberry mug cake with powdered erythritol. Serve immediately or let cool, cover, and refrigerate for up to 1 week.

There’s nothing better than enjoying a warm, comforting dessert without derailing your health goals. This Keto Blueberry Mug Cake with its hint of lemon zest proves that eating low-carb doesn’t mean giving up on taste or indulgence. With simple ingredients, a speedy cook time, and minimal cleanup, this mug cake deserves a regular spot in your keto recipe rotation. So go ahead, treat yourself — you’ve earned it.

Frequently Asked Questions

Can I make a Blueberry Mug Cake without eggs?

Yes! You can absolutely make a Blueberry Mug Cake without eggs by using alternatives like unsweetened applesauce, Greek yogurt, or flaxseed meal mixed with water. These options still help bind the ingredients and keep the texture soft and fluffy. For a keto-friendly version, try using a flax egg or chia egg to keep it low-carb.

How do I keep my Blueberry Mug Cake from becoming rubbery in the microwave?

The key to avoiding a rubbery Blueberry Mug Cake is not overcooking it. Microwave times can vary, so start with 60-70 seconds and check the texture. Also, avoid overmixing the batter and make sure to use almond flour or coconut flour instead of regular flour for a keto version. Adding a bit of oil or butter helps retain moisture too.

Is a Keto Blueberry Mug Cake healthy for weight loss?

Yes, a Keto Blueberry Mug Cake can be a great option for weight loss if it fits within your daily macros. It’s low in carbs and sugar, yet high in flavor, making it a smart choice for those following a ketogenic or low-carb lifestyle. Just watch your portion sizes and ingredients — use natural sweeteners like erythritol or stevia to keep it keto-approved.