lemon blueberry cake in a white bowl with yogurt on top

This easy Blueberry Lemon Mug Cake is moist, fluffy and bursting with juicy blueberries. Ready in minutes, this is the perfect healthy fresh breakfast, snack or dessert. Vegan, gluten free, oil free & refined sugar free!

lemon blueberry muffin in a white bowl with yogurt on top on wooden plate

For day 3 of Mug Cake Week we’re making a Lemon Blueberry Mug Cake!

Think lovely lemon flavoured moist n’ fluffy muffin-ish cake studded with juicy blueberries– the combo just screams spring (highly appropriate for this season)!!

I love having this one in the morning because it’s so fresh and simple and takes under 3 minutes to make. Talk about a quick breakfast eh?

ingredients for lemon blueberry cake on a marble top

Ingredients You Will Need To Make This Recipe

  • Non Dairy Yogurt: If you have a thicker yogurt or greek yogurt, add 1 tbsp to thin it out just a bit until the right consistency.
  • Blueberries: Fresh or frozen!
  • Lemon: Both the zest and juice for that lovely lemon flavour.
  • Oat flour: The oat flour really gives a nice texture and crumb to this muffin cake so I wouldn’t suggest substituting it.
  • Maple syrup: Any liquid of sweeter will work.
  • Cashew Butter: For more moisture and adds a bit of body. Tahini also works well.

In addition, you’ll also need baking basics like vanilla and baking powder.

How to Make it

Like any mug cake, it’s incredibly quick and easy to make:

  1. Mix all the wet ingredients together until combined. Mix in the dry ingredients. And then lastly fold in the blueberries
  2. Microwave for 1 minute and then another 30 seconds in 10 second intervals. Be sure not to over bake or it will come out as a rubbery dry mess. If you’re unsure, nn my banana mug cake post, I go over some tips to make sure your mug cake comes out perfectly 🙂

No microwave? NO PROBLEM! You can totally bake it in the oven:

Just bake at 350 F (180 C) for around 10-12 minutes or until it starts to rise and the top is cooked. Check doneness by inserting a toothpick and ensuring it comes out clean (a few crumbs is okay).

texture of lemon blueberry mug cake on a spoon

Guyssss, look at that texture! So fluffy and moist. You can either think of it as a mug muffin or cake, either way it’s so dang good! If you’re having it for breakfast, you can double up the recipe and make it in a wider mug or bowl– it’s a great and way to change up oatmeal! Plus, it brings up the ~spring vibez~.

close up shot of half eaten lemon mug muffin

More Vegan Single Serving Desserts to Love:

lemon blueberry muffin in a white bowl with yogurt on top

If you recreate this Healthy Blueberry Lemon Mug Cake recipe let me know how you liked it by leaving a comment and rating below or by tagging me on Instagram @Okonomikitchen, I love seeing all of your tasty recreations!

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close up shot of half eaten lemon mug muffin

Vegan Lemon Blueberry Mug Cake

  • Author: Lisa Kitahara
  • Total Time: 2.5 minutes
  • Yield: 1 serving 1x


This easy vegan Blueberry Lemon Mug Cake is moist, fluffy and bursting with juicy blueberries. Ready in minutes, this is the perfect healthy fresh breakfast, snack or dessert. Gluten free, oil free & refined sugar free!





Microwave Method: 

  1. Add the lemon juice, cashew butter, maple syrup, non dairy yogurt, vanilla and lemon zest into a mug and stir until combined. 
  2. Add in the oat flour and baking powder and mix until just combined. If the batter looks too thick (due to thicker yogurts), stir in 1 tbsp of non dairy milk. Fold in blueberries. 
  3. Microwave on high (1000 W) for 1 minute and 30 seconds. Microwave for another 10 seconds if needed.
  4. Let it cool for 2 minutes and enjoy!

Oven Method:

  1. Follow steps 1 & 2 above.
  2. Bake at 350 F for 10-12 minutes until cake rises and top is cooked. Check doneness by inserting toothpick and ensuring it comes out mostly clean. 


  • Helpful Equipment: 8 oz mug or bowl, 10 oz mug or bowlmini spatula 
  • Nutritional Information Disclaimer: Nutrition information is a rough estimate calculated on an online tool (Cronometer).
  • Prep Time: 1 minute
  • Cook Time: 1.5 minutes
  • Category: dessert
  • Method: microwave
  • Cuisine: vegan, gluten free


  • Serving Size: 1 serving
  • Calories: 308
  • Sugar: 16g
  • Sodium: 274
  • Fat: 11.7g
  • Saturated Fat: 1.1g
  • Unsaturated Fat: 6.8g
  • Trans Fat: 0
  • Carbohydrates: 44.5g
  • Fiber: 2.1g
  • Protein: 7.5g
  • Cholesterol: 0

Keywords: microwave vegan mug cake, gluten free mug cake, lemon blueberry mug cake, microwave blueberry muffin


blueberry lemon mug cake pinterest graphic

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About Lisa

I'm Lisa, a home cook, recipe developer and founder of Okonomi Kitchen. Here, you'll find a mix of classic and modernized Japanese recipes, and creative, plant-forward meal inspiration using seasonal ingredients. I hope to share more about Japanese cuisine and culture through food and recipes.

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  1. I made this twice. Once with tahini & maple syrup and again with almond butter and date syrup. Both yummy!

  2. I enjoyed this as a change from my regular chocolate/brownie mug cakes. Thanks for another healthy(er) option!

  3. I made thisss and it was my first time making a blueberry lemon which actually tastes SOO GOOOD

  4. Any suggestions to make this grain free? Possibly using almond and cassava flours? Looks so delicious but I’m not eating grains at the moment.. thanks in advance! ✨💗

    1. Hi Samantha! I haven’t tried using both those flours so I can’t guarantee it will work. I would try a combination of two grain-free flours though because almond is heavier and cassava can get quite sticky. If you make any swaps, let me know how it goes!

  5. I’ve made this about 10 times by now. It is SO DELICIOUS. I find that it comes out more cakey, less mushy, when I use fine oat flour. My fave mug cake recipe of all time!