Kirbie's Cravings

One Minute Brownie Mug Cake

photo of a spoonful of brownie cake
Yes, that’s right. I created a brownie mug cake that takes only one minute to make in the microwave. I have to confess, I’m pretty thrilled. This is my favorite mug cake creation yet. And it is still super easy to make.

It’s super chocolatey like a brownie should be. This is more like the cake-type brownies rather than the chewy brownies, but it’s still so good. When it first came out of the oven, the brownie was quite fluffy, like a really good chocolate cake. After a minute or so, the batter turns denser, much more like a brownie because of the minimal amount of flour.

close-up photo of a spoonful of cake
I made two, offered one to the FH. At first he refused. He’s gotten kind of sick of my mug cake creations. I insisted he take a bite and he didn’t regret it. He loved it and kept the brownie for himself.

Brownie mug cake

Because brownies are denser, these don’t rise nearly as much and you don’t need an oversized mug unless you want to double the quantity. A regular mug will do.

There’s one extra step required to create these cakes, but it’s still super easy and clean up is still minimal.
close-up photo of a spoonful of brownie cake

One minute Brownie mug cake

Servings: 2
Prep Time: 10 minutes
Cook Time: 1 minute
Total Time: 11 minutes
Course: Dessert
Cuisine: American
You don't need to wait to bite into a warm homemade brownie. This brownie-in-a-mug takes just minutes to make and is a chocolatey treat for two.
4.84 from 12 votes


  • 2 oz semisweet chocolate chips or chopped chocolate
  • 2 tbsp unsalted butter
  • 1 egg
  • 4 tbsp sugar
  • 2 tbsp flour


  • Select two microwave-safe mugs. In each mug place one tbsp of butter and 1 oz of semisweet chocolate. Microwave each mug for 40 seconds (microwave them separately). Remove and stir until chocolate is completely melted with a small fork.
  • Add 2 tbsp sugar to each mug and stir. Beat egg in a small bowl, add half to each mug and mix. Add in 1 tbsp flour to each cup and mix until smooth.
  • Cook each brownie for 1 minute in the microwave (do each separately). Serve while warm.

The nutrition information provided are only estimates based on an online nutritional calculator. I am not a certified nutritionist. Please consult a professional nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.

Did you make this recipe?I'd love to see it! Mention @KirbieCravings and tag #kirbiecravings!

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Recipe Rating

136 comments on “One Minute Brownie Mug Cake”

  1. I’ve just come across this recipe as was looking for something to satisfy a craving as didnt have anything sweet in – all I can say is wow! Tasted sooo good! Thank you for a great recipe & satisfying my craving ? 

  2. Am confused do we mix the butter Nd chocolate or not explain d 2mugs

    • The butter and chocolate are melted first in the microwave. Once you mix the batter in each mug, microwave them one at a time to cook the cakes.

  3. Im sorry i had better, its super dry…

  4. This is my favourite mug dessert! I first tried it months ago and would make it constantly but then I lost the recipe. I’m so glad I kept searching for it and found it again!

  5. It worked! it tasted amazingly but i would reccomend to eat it as soon as you can, or it hardens and gets dry, i love this recipe! will definetely use it again

  6. This worked out amazingly! I was a little hesitant to use a raw egg, but unlike what I thought, it didn’t make it spongy at all! Why didn’t I find this before? Def sharing this with my friends and family! Please continue making and sharing these amazing recipes!

    Xoxo, Scarlet

  7. best thing cake thingamabob ever! i reccomend . I LOVE IT SO MUCH


  9. I made this with gluten free self raising flour and it still tasted delicious! 
    Thank you 🙂

  10. Very tasty I made this I had all the ingredients and it gave an obnoxious amount of flavor but this was still sooooooooo good

  11. OMG!!!!!Never using Coca powder in mug cakes again .It was so delicious!!!This was my first time making anything from this website and I already LOVE it!!!! ??

  12. I love this recipe! It’s so easy and I’ve made it so many times. I clean while it’s microwaving then I eat it! It’s absolutely delicious, it is hard to clean the mug after but totally worth it. 

  13. This was the best chocolate mug brownie I’ve ever made!!!

  14. loved this recipe!! delicious, easy and overall just simply amazing! 100 % would recomend.

  15. Definitely the best mug brownie I’ve made! Is it possible to make this without self-raising flour? That’s what I’ve been using.

  16. Hi! I’m not sure what I’m doing wrong, I made the recipe, I put everything in 1 mug (a bigger one) and then put it in the microwave for 2 mins. It came out really wet and sticky. Do I leave it in for longer? Bacause last time I did that, it came out all rubbery. 🙁

    • This recipe is designed for 2 individual cakes. You should divide the batter into two mugs as stated in the instructions and cook each separately. Adding them all into one will make the batter too dense when it is fully cooked.

  17. Soooooo good!

  18. Oh Yeah Baby! Delicious!

  19. It is good love it only thing can you make it like less sugar

  20. Literally all the perfect quality of a brownie done in less than a quarter of the time it would take to make brownies from the box. Plus, i’m not stuck with a whole batch justin waiting to be eaten day by day. Soft, chewy, and chocolatey.. so yummy. i wish i came across your website when i was pregnant because your recipes would’ve been my go-tos!!!

  21. This recipe is sooooo awesome.
    I made the brownie and it tastes so good.
    I love it.
    Thank you for such a wonderful recipe

  22. loved this recipe! made it at home in only 5 minutes! the texture was a little spongy, but i think that was only because i added too much egg to my mug. other than that, tasty and easy! 
                                                            xoxo, Sophia 

  23. Sitting here with a sweet tooth, searching for something with minimal ingredients and happened upon this. I’ve never made a mug cake, or brownie. Such a pleasant surprise, this was! Near the bottom, it’s just like a lava cake. Thanks Kirbie 🙂

  24. Lovely basic recipe it supresses my midnight snack craving. I added .5 oz more chocolate than the recipe but I figured it would be harmless. I’m not sure if I didn’t cook it long enough or it was the extra chocolate but I think next time I’ll add a little more flour and maybe some vanilla.

  25. Can I use brown sugar and mix it with the white?

    • I recommend making the recipe as is and then you can try diff versions and see how it compares. brown sugar will change the texture of the brownie.

  26. Seeing as I made this at 2 am, with nobody to share it with (Bummer…NOT!), I used a bowl for the double serving ( took 2min instead of 1 no biggie) and having no semisweet chocolate (not a fan of semisweet chocolate) I used a regular milk chocolate bar i had, kept everything else the same and it turned out AMAZING!!!

  27. This webpage IS SO OVERLOADED WITH ADS it is difficult for my computer and I have a top notch laptop…urrr…. However, this recipe was the best I have found so far!! LOVE IT~

    • what web browser are you using? i dont have a top notch laptop and i dont have issues with it loading any slower than other blog sites.

  28. This was perfect! So yummy and convenient!

  29. I made one jumbo brownie in a large mug and it is way too deadly. Someone save me! This is amazing!

  30. Thank you, thank you, thank you!! I’ve been searching for microwave mug cake recipes that don’t taste rubbery or just plain bad. This one was awesome! The texture and taste were absolutely perfect! This has just become my go to recipe for late night cravings! 

  31. I absolutely adore this recipe.  I have a serious cinnamon addiction, though, so I substituted half of the chocolate for cinnamon morsels.  The result was glorious, especially after I added more on top of the hot brownie.