Coffee Mug Cake


5 from 102 votes
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This single-serving coffee mug cake recipe is a healthy way to satisfy your sweet tooth in just one minute! Fluffy on the inside and topped with an easy streusel, it’s low carb, keto friendly, and easily made in the oven! 2 grams net carbs per serving.

coffee mug cake

Keto Coffee Cake

I’m all about healthy single-serving desserts, especially if they are quick and easy. Mug cakes are one of my favorites, like this blueberry mug muffin, mug brownie, and vanilla cake.

After sampling the delicious classic coffee cake from Starbucks, I wanted to recreate it and give it a single serving treatment.

The coffee cake was fluffy on the inside, tender on the outside, and topped with a delicious streusel topping. It had hints of cinnamon and vanilla, and was instantly one of my favorites!

I gave it a single serving and healthy makeover! My almond flour coffee cake is made with simple and low carb ingredients and is a fantastic keto dessert or sweet treat to have with a mug of coffee or tea! 

Saying this coffee mug cake is easy is an understatement. It literally takes 1-2 minutes in the microwave, and comes with instructions to make in the oven! 

Ingredients to make this recipe

for the mug cake

  • Almond flour– Blanched almond flour is best, not almond meal. The blanched variety yields a fluffier and lighter cake. 
  • Coconut flour– Gives the mug cake the cakey texture, and with no coconut flavor. 
  • Baking powder– Gives the mug cake some rise and fluffiness. 
  • Granulated sweetener of choice– Any keto sweetener can be used, like monk fruit sweetener or erythritol. 
  • Cinnamon– A must for the traditional coffee cake flavor! 
  • Egg– Room temperature eggs. 
  • Milk of choice– Any milk can be used. I used unsweetened almond milk. 

For the Streusel topping

  • Almond flour– Again, try to use blanched almond flour.
  • Sweetener of choice– Monk fruit sweetener or erythritol. 
  • Almond butter– Gives a buttery crumble topping, minus the butter or oil. 
  • Cinnamon– Adds cinnamon flavor. 
  • Milk– To mix everything together to make the crumble. 
  • Powdered sugar– Drizzle some keto powdered sugar over the top. 

How do you make a coffee mug cake?

  1. Lightly grease a small, microwave-safe bowl or ramekin.
  2. In a small bowl, add your streusel ingredients and mix well, until combined
  3. Add your dry ingredients and mix well. Add your egg and milk of choice, and mix until a smooth batter remains. If the batter is too thick, add extra milk.
  4. Top the mug cake with the streusel topping and microwave for 1-2 minutes, or until cooked.
  5. Allow cooling for 1-2 minutes, before enjoying! 

keto coffee cake

Can I make this in the oven? 

The quickest option is to make the coffee cake in the microwave. However, not everyone has a microwave so this mug cake can be made in the oven.

Simply replace the microwave-safe bowl with an oven-safe ramekin or similar. Bake at 180C/350F for 10-12 minutes, or until a skewer comes out clean.

Tips and Tricks for the Perfect 1-minute coffee mug cake

  • Microwaves differ based on make and model. Start with microwaving it at one minute, and if it is not cooked, continue microwaving it in 20-second spurts until it is done.
  • Use a microwave-safe cereal bowl or shallow container instead of a mug. This will ensure the cake is fully cooked through.
  • Do not omit the coconut flour or try to substitute it. It is key to include it to ensure the mug cake is fluffy and tender on the outside.
  • As all coconut flour brands differ, you may need more than half a cup of milk (the suggested amount). Continue adding more milk to the batter, until it is smooth and thick.
  • To reduce the fat and calories, you can use an egg white instead of a whole egg. 

almond flour coffee cake

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keto coffee cake

Coffee Mug Cake

5 from 102 votes
This coffee mug cake is a delicious single serving keto coffee cake, ready in just one minute! Moist, fluffy and easily made in the oven.
Servings: 1 mug cake
Prep: 1 min
Cook: 1 min
Total: 2 mins


For the mug cake

For the optional streusel topping


Microwave instructions

  • In a small bowl, combine the dry ingredients and mix well.
  • In a separate small bowl, combine the almond extract, milk, and the egg and whisk lightly. Add the mixture to the dry mixture and mix until just combined.
  • Prepare the streusel topping. In a small bowl, combine the almond flour with the cinnamon and palm sugar and mix well. Add the almond butter and mix well until a thick, crumbly mixture is produced. Add a dash of dairy free milk if desired.
  • Grease a microwave-safe bowl or ramekin and pour the batter in it. Top with streusel and microwave for 1-2 minutes, or until cooked through. 

Oven Instructions

  • Preheat the oven to 180C/350F. Grease a large ramekin and set aside.
  • Follow directions as above and once ready, bake in the oven for 10-12 minutes, until a toothpick comes out clean.


* Start with 2 tablespoons of milk then adjust accordingly. If the batter is too thick, add more.
Coffee mug cake should be eaten fresh and enjoyed warm. Do not refrigerate or freeze for later. 


Serving: 1mug cakeCalories: 172kcalCarbohydrates: 7gProtein: 11gFat: 12gSodium: 396mgPotassium: 69mgFiber: 5gVitamin A: 270IUCalcium: 245mgIron: 2mgNET CARBS: 2g
Course: Dessert
Cuisine: American
Author: Arman
Tried this recipe?Give us a shout at @thebigmansworld or tag #thebigmansworld!

Disclosure: This post may contain affiliate links. I may earn a small commission for my endorsement, recommendation, testimonial, and/or link to any products or services from this website.

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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  1. Thanks to you Arman, I never have to spend $$ at Starbucks 🙂 I like my coffee best with a scone. I am addicted to them recently (as long as they have ‘chips’ in them, chocolate, cinnamon, white chocolate…) I like using ramikins for my microwaveable creations. Most of my mugs are too big for these cakes and they make the cake look like it’s for a baby

  2. I am looking for an amazing pumpkin custard that is paleo.. (that I can eat instead of pumpkin pie) Do you have any recipes of this kind? I love your ideas, you are so creative. Thank you so much.

    1. I have a pumpkin cookie dough which I love- It’s not custard like in terms of consistency, but is like pumpkin pie filling 🙂

  3. Well who needs Starbucks when we have your blog?!! 🙂 Lazy days do prevail sometimes though. But seriously, you are going to do me in with all this deliciousness! Wait, I forgot this is healthy…I’ll take two!

  4. I don’t think I have ever gotten a sweet treat at Starbucks, but I would be all over this coffee cake! No doubt your version is by far tastier

  5. Don’t fight it. Just embrace it and let the Starbucks fetish lull you!
    Coffee with….. anything I guess. As long as coffee is involved I am all set 😉

  6. Wait, does coffee cake not have any coffee in it? Gah I must sounds so lame but coffee cake in the UK always has coffee in it! Not that this needs it, it sounds amazing and the idea of having the perfect cake to go with coffee sounds perfect!
    Then again most Brits are obsessed with tea… And we do have tea cakes… That are more like English muffins than cake… We sure like to confuse people!

  7. This sounds so good! I’ve actually never had the coffeecake from Starbucks but this looks even better than the one I’ve seen there!

  8. Woah, man this looks SO GOOD. 🙂 It’s not breakfast time yet, but I may just have to make this for tomorrow’s breakfast. O_O And 1 minute in the microwave? You can’t beat that!

  9. If I could get away with it, I would probably just eat streusel topping on it’s own and scrap whatever was under it. Love.that.stuff. And I’ll have my coffee cake with coffee… duh.

  10. I’ll skip the coffee and just take one of these coffee cakes. How about trading it for a slice of my mum’s homemade eggnog cake ;)?

  11. Ahhh! I just stumbled upon your site randomly and it’s so awesome. I’ve honestly been drooling over your recipes for about 10 minutes now. Keep up the good work dude! 🙂