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The Moistest Chocolate Mug Cake

This is the moistest chocolate mug cake you will ever have. It’s not spongey or dry like other mug cakes! I personally tested this recipe FOUR times to finally achieve this amazing texture!

The moistest chocolate mug cake you will ever have! It's not spongy like other mug cakes! Recipe on

The moistest chocolate mug cake you will ever have! It's not spongy like other mug cakes! Recipe on

The moistest chocolate mug cake you will ever have! It's not spongy like other mug cakes! Recipe on

Ok, so you’re probably so over mug cakes and you’re probably rolling your eyes at me right now but STOP! I promise you this isn’t like any other mug cake out there. I’ve tried a bunch of mug cakes and I hated them. I thought they were a really neat concept for a quick dessert fix but nothing would ever beat baking an entire cake or cupcake. I hated that all the mug cakes came out SPONGY and they had the grossest texture.

Last week, I was CRAVING chocolate like none other. It was a pretty dire situation. We didn’t have any desserts in the house because I hadn’t been baking and I didn’t want to run out to get anything so I thought I’d give a mug cake a shot. It ended up turning into a recipe development hour because the first batch came out horrible. Like, I threw it in the trash can and it was just one lumpy sponge thing. The second one was slightly better but still really bad. The third, I switched out some ingredients and added a little bit more of some and it came out how I wanted but I knew it could’ve been better so on the fourth try, I finally got it to work and the exact texture I wanted.

You guys, this is the moistest chocolate mug cake I’ve ever tasted before. I’m not joking! You have to try this and see for yourself. It’s a great alternative to baking an entire pan of brownies & it’s a super awesome quick fix for that chocolate craving! Jason loved it and said it tasted like brownies! Yay :)

The moistest chocolate mug cake you will ever have! It's not spongy like other mug cakes! Recipe on

The moistest chocolate mug cake you will ever have! It's not spongy like other mug cakes! Recipe on


The Moistest Chocolate Mug Cake
Recipe type: Dessert
Prep time: 
Cook time: 
Total time: 
Serves: 1
  • ¼ cup all-purpose flour
  • 2 tbsp. unsweetened cocoa powder
  • ¼ tsp. baking powder
  • 2 tbsp. granulated sugar (you can add 1 tbsp. more if you like it a bit sweeter)
  • ⅛ tsp. salt
  • ¼ cup + 1 tbsp. milk
  • 2 tbsp. vegetable oil
  • 1 tbsp. hazelnut chocolate spread
  1. In a medium bowl, whisk together dry ingredients.
  2. Whisk in the milk and vegetable oil until all ingredients are combined and batter has no clumps.
  3. Pour batter into a microwave-safe mug. Mine was a 14-ounce mug. You want enough head space for the cake to rise without pouring over.
  4. Add 1 tbsp. of hazelnut chocolate spread in the middle of the batter. Just drop it in the middle, no need to push it down and sink it in the batter.
  5. Place a paper towel into the microwave and set the mug on top (this is to catch any batter if your mug cake overflows).
  6. Microwave mug cake for 70 seconds on high (PLEASE READ NOTES CAREFULLY BELOW)
  7. Carefully remove from microwave and enjoy!
Please note that ALL microwaves are different therefore can yield different results and can overcook this mug cake if you aren't careful. My microwave is 950 watts and I cooked mine on 100% power for 70 seconds. Knowing this information, it may help you better judge how long to cook yours for and at what power.

You can totally omit the tablespoon of chocolate hazelnut spread if you want or use a different spread of your choice (peanut butter, biscoff, etc.). I just thought it made the cake even more moist but the cake itself is moist enough without it!

**This recipe is specifically made for the microwave. I developed it for the microwave. I don't know cook time or temperature for an oven...I'd imagine it'd be a very quick cook time at a low temp., but since I didn't test the recipe for an oven, I cannot give specifics. Sorry!

If you're looking for a VANILLA version, here is the link to The Moistest Vanilla Mug Cake recipe!




  1. LISA
    10/18/2014 at 3:51 pm

    Recipe needs a tbsp more sugar.

    • Julie
      10/19/2014 at 8:59 am

      Thanks for your feedback! Everyone has different taste preferences so if you think it needs a tbsp. more of sugar, then by all means add it.

    • sarah
      10/27/2014 at 7:39 pm

      Absolutely the best cake ever. I microwave it in the bowl I mix it in and then I whip some milk up as for whip cream. So Yummy.

    • sarah
      10/27/2014 at 7:40 pm

      Absolutely the best cake ever. I microwave it in the bowl I mix it in and then I whip some milk up as for whip cream. So Yummy. Also I used dark cocoa powder as well

    • Sarah
      10/29/2014 at 12:19 am

      I agree that it needed slightly more sugar. Not bad overall, though!

  2. Jess
    10/22/2014 at 8:36 pm

    This is SERIOUSLY the BEST mug cake I’ve ever had!!! I’m a fiend and added an extra tablespoon of cocoa powder. But it is actually moist and not dry and spongey :D

  3. Rachel
    10/22/2014 at 9:20 pm

    Turned out great! I substituted a gluten free flour mixture, and still tasted good. Look forward to adding different fillings in the middle (I did marshmallow fluff this time) !

  4. Ella
    10/22/2014 at 11:49 pm

    OMG!! this is the best ever! I have tried mant mug cakes before but this is the best!! thank you so much for sharing this recipe!!

    • Ella
      10/22/2014 at 11:50 pm


  5. Summer
    10/23/2014 at 2:25 am

    Wow! My first mug cake ever and it was quite a surprise! I didn’t have cocoa powder so substituted semi-sweet chocolate chips and no Nutella so threw a few more chips in the middle. I also added a teaspoon of vanilla and used olive oil as that was all I had. This definitely meets the need for a late night chocolate craving though I would say at least five minutes prep for someone who doesn’t have all the ingredients on the counter and has to keep checking the recipe. (-; Out of curiosity, how come eggs don’t go into the mix? Thanks!

    • Julie
      10/23/2014 at 8:05 am

      I’m glad you enjoyed this!! As mentioned in previous comments, eggs don’t go into the mix because it’s what makes the cake spongy. If you think about it, a regular cake or pastry recipe typically has 1-2 eggs in it but in a mug cake, putting 1 whole egg in it? That’s just too much for the quantity of what you’re making and why it causes the cake to be spongy. Hope that helps :)

      • LynneW
        10/27/2014 at 6:50 pm

        I love eggs- but an egg in a mug is just too much. Especially if I had eggs for bkfst. That’s my wk’s allotment!

  6. Pip
    10/24/2014 at 3:43 am

    Wow! I’ve had a rough day and there was no chocolate in the house but I found some good quality cocoa powder so Googled mug cakes and yours looked the most promising. So glad I made it! I have no milk in the house so used unsweetened yoghurt and just added a little water. I used a peanut butter/chocolate spread. The combo of the yoghurt and peanut butter made it quite salty so next time I’ll leave out the added salt but otherwise it was delicious! I could only eat half and so my husband is finishing off the rest.

  7. Lorna
    10/24/2014 at 12:44 pm

    Delicious! Moist, chocolatey. Loved the Nutella. Hit the perfect spot. Thank you!

  8. christian
    10/25/2014 at 9:52 pm

    wow, perfection. rainy sunday and i’ve been good all week and just caved. i used sweetened cocoa and threw in a few chopped up chocolate buttons. gave mine an extra 20 seconds. gooey and perfect. thanks.

  9. Hannah
    10/26/2014 at 12:11 pm

    I love it ! The only thing was that I had to cook it a little extra so I had to wait longer to try it :P
    But I will defiantly be making it again ! X

  10. Kaitlyn
    10/26/2014 at 9:19 pm

    This was great. This was my first mug cake. I had a late night craving for cake and this was so quick and easy. I panicked for a minute because I thought I forgot nonstick spray but when I checked it wasn’t included so I went with it. I was surprised when it was pretty much falling out of the mug. Thanks!

  11. Emma
    10/29/2014 at 6:24 am

    This is by far the best mug cake recipe I’ve tried so far. I didn’t have any hazelnut spread, so I substituted it for raspberry conserve, and it was AMAZING. Beautifully moist and very flavourful, and just right for sating those late night emergency chocolate cravings. I’ll definitely be making it again! Thanks for the recipe :)

  12. Anna
    10/30/2014 at 1:46 am

    Hi, I was wondering if the All-Purpose flour can be substituted for Plain or Self-Raising flour

    • Julie
      10/30/2014 at 7:32 am

      Hi Anna, plain flour is the same as all-purpose flour. Do not substitute self-rising flour for this because it will leave your cake really spongy. I tested it with self-rising flour and the results were not something edible.

  13. 10/30/2014 at 4:56 pm

    This recipe is by far the tastiest , easiest and quickest to make. I was sat watching a show of Cake boss and had the craving for cake but my mum was feeling lazy. I googled up some cake mug recipes because I couldn’t exactly bake a whole cake without any disasters considering I’m only 13 and came across this. Thank you, my parents even made me make them some. I used plain flour instead of all purpose but it still tasted good.

  14. Karen
    10/30/2014 at 9:37 pm

    Made it just like you said – WOW! Just WOW! Thanks! :)

  15. Littleblu33
    10/31/2014 at 3:10 am

    So good! Want to put in a bit of vanilla and a smudge more sugar and cocoa, awesome nevertheless.

    No Nutella in the house (roommate despises it) so I put in a bit of frosting instead. Tasted like a perfect lava cake!

  16. Mari
    11/02/2014 at 8:47 pm

    True to your word! So moist and really hit the spot. I added a half tablespoon more sugar to give a little more sweetness, vanilla extract and a few shakes of cinnamon powder…easy breezy. I’m chowing on this right now. Thanks so much!

  17. 11/02/2014 at 8:53 pm

    This looks wonderful. Definitely going to give it a try!

  18. Emily
    11/03/2014 at 9:12 pm

    This is the best mug cake ever! I’ve tried so many different types of recipes since microwave mug cakes became a “thing” and this is by far the best. It is the most like baking a cake in the oven. The cake itself is so moist and delicious but the Nutella just adds the extra decadence that it needs. This is my new go to for chocolate cravings!

  19. Dawne
    11/04/2014 at 5:58 pm

    This cake was very moist. However, it was missing enough sweet for how delicious it LOOKED. When I make it the next time, I will double the sugar. Then I think it will be perfect.

  20. Jenell
    11/05/2014 at 9:51 am

    I substituted the oil with butter and was not able to put baking powder since we ran out but it still turned out to be delicious and very very fudgy/moist! Threw in a piece of chocolate truffle too instead of the nutella. 2 tbsp of sugar wasn’t enough so I added caster sugar as a topping after microwaving. Best cake mug recipe I tried!

  21. Jahnavi
    11/09/2014 at 1:57 pm

    Hi Julie! I followed your recipe and the cake was so yummy!!! It was so soft and moist that it’s hard to believe the fact that it came out of a microwave!!! Excellent recipe! Thanks…all the way from India :))

  22. Maddie
    11/10/2014 at 3:06 pm

    For some reason my nutella didnt sink in? Still tasted delicious and I had it as sort of icing :)

  23. tama
    11/11/2014 at 12:43 pm

    looks so yummy T_T
    I will try it as possible as i can

    thank you so much 4 the recipe:)

  24. chloe chong
    11/13/2014 at 5:53 am

    I am new to bake, would you suggest to use chocolate powder or chocolate bar as luxury chocolate Malaysia. Please guide me on this.

    • Julie
      11/13/2014 at 1:57 pm

      I would use chocolate powder.

  25. Jessica
    11/13/2014 at 1:46 pm

    I am addicted! I’ve made this several times. I made the batter in a to-go container and packed it with my boyfriends lunch. He stuck it in the microwave at work and had instant cake! Hank you for sharing!

  26. Jessica
    11/13/2014 at 8:03 pm

    Mmm I am so glad I found this recipe! I have made mug cakes before and they always came out so spongey like you said. I made this one tonight with my 7 year-old son and we both loved it! I added a couple drops of vanilla and used peanut butter for the extra little dollup. So yummy!

  27. Jacklyn B
    11/14/2014 at 3:25 am

    This is the best recipe hands down. My boyfriend and i have tried many different ones which were too dry, too rich, too sweet. This was perfect. Sometimes i just don’t feel like making a whole pan of brownies. So, thank you for sharing this recipe.

  28. RiRi
    11/14/2014 at 7:12 pm

    Oh wow! I have just made this as a midnight snack and it’s the best mug cake I’ve ever made! I didn’t quite have enough cocoa powder so stirred a little Nutella into the mix and used olive oil as I didn’t have vegetable, but it still came out amazing! Admittedly I did misjudge the cooking time (mine is a lower watt) so had to do a second cook when I got to the gooey bottom half, but since there is no egg I didn’t need to worry about eating raw egg.

  29. Ekill
    11/14/2014 at 8:42 pm

    I just made this tonight and I stuck a chocolate covered marshmallow in it!!! Yummy!!!! It is true to its word and is the moistest mug cake you will ever eat!!!!!

  30. Delia
    11/15/2014 at 2:53 pm

    This recipe was really soft and moist, but it didnt have much taste to it.. did i do something wrong??

    • Julie
      11/16/2014 at 8:52 am

      Not sure why it wouldn’t have much taste. Maybe you should add more sugar or more cocoa powder? Or add some chocolate chip pieces in there! I’m not quite sure what you mean by ‘much taste’ – like sweetness or chocolate-y taste?

  31. Gabriela
    11/15/2014 at 4:38 pm

    Just WOOOOW! Thank you! Love it! :)

  32. Jo Stone
    11/15/2014 at 6:52 pm

    I dusted the top with some powdered sugar. I thought it was great. My hubby wanted more flavor so he pulled out some O’Donnell’s cappuchino wine (a specialty drink he found) and that was good! I think I might try a little vanilla in it myself. What a nice treat we had. Thank you for the recipe!

  33. Lynn
    11/15/2014 at 10:25 pm

    Loved this! Sugar content was perfect! I thought 2 tbsp was just right.

  34. Kelly
    11/16/2014 at 2:12 pm

    I recently found a picture of a mug cake online and was very interested to try it myself! It was delicious and crazy moist! I made it for my boyfriend and he couldn’t believe it was made in a microwave! Thanks for the recipe!! Much love from NY!!!

  35. Susan D
    11/16/2014 at 5:03 pm

    I have tried other mug recipes that didn’t turn out at all. This is a wonderful recipe and the cake came out great. It really was moist. I added a bit more cocoa and sugar and it was just right. I will definitely make this again.

  36. jenny
    11/16/2014 at 7:42 pm

    Hi! Thanks for the recipe, just tried making it but it didn’t come out like a cake. It was gooey and wet, even though I nuke it far longer than 2 minutes in 20 seconds intervals. It seems to get even wetter when I renuke it after eating half of it. I also tested my baking powder, it still frizzes when come in contact with hot water. Maybe my mug was too big? The content only comes up half way in it. :(

    • Julie
      11/17/2014 at 7:20 am

      How big was your mug? If it’s a huge mug, then it probably doesn’t cook it as well because of how deep it is, if that makes sense.

  37. Marilyn
    11/16/2014 at 10:22 pm

    So delicious! I doubled the recipe for two mug cakes. I don’t have quite as sweet a tooth as my husband, so I prepared the matter as directed, poured half into my mug and added a bit more sugar to the already mixed batter for his. I didn’t have Nutella on hand, so I tossed a few chocolate chips on top instead. 70 seconds in my 1000 watt microwave was perfect — very moist cake with a slightly gooey center of melted chips. Mmm.

  38. Isabel vS
    11/17/2014 at 10:18 am

    I Love this recipe so much, and I followed the recipe exactly. However, my dollop of Nutella just sunk to the very bottom. It was still simply delicious, but is it supposed to be like that?

    • Julie
      11/17/2014 at 11:16 am

      I guess it could sink to the bottom. Mine didn’t, but as long as it’s all edible, I think you’re golden! :)

  39. Kathleen M Smith
    11/17/2014 at 7:33 pm

    So moist and yummy! I used splenda instead of sugar.

  40. Diana
    11/17/2014 at 9:50 pm

    Thank you so much for sharing this just perfect recipe. Instead of a mug I cooked it in my pamper chef prep bowl. Comes out just perfect. It is also good with some mix-ins (like pecan pieces!). Thanks again.

  41. Maren
    11/18/2014 at 2:09 pm

    My first mug cake, it was delicious. Used olive oil and substituted milk with coffee. Divided the mixture into two small cups and cooked them for 35 seconds each.

  42. Gina
    11/18/2014 at 6:28 pm

    Delicious! I think the two tbsp. of sugar is just right, but I like my chocolate dark. Being lactose intolerant, I used almond milk with good results. My cook time was just under two minutes in a 1000 watt microwave. I was generous with my cocoa and added 1/8tsp of cinnamon. I found that the Nutella/peanut butter sank to the bottom only in a wide mug.

  43. personwho really likes this
    11/18/2014 at 7:35 pm

    hey it looks soo good i want to try this, but i was wondering how important is the baking power and can i make this recipe without and would it taste the same!????! thx

    • Julie
      11/19/2014 at 1:36 pm

      Baking powder is essential in baked goods otherwise you’ll get a flat cake. So, yes, it’s very important and I would not make it without it.

  44. Lili
    11/19/2014 at 10:52 am

    I substituted butter for the vegetable oil and virgin coconut oil for the spread. The results were outstanding! This is a wonderful new favorite. Thanks so much for sharing!

  45. Rhea
    11/19/2014 at 8:53 pm

    This. Is. Perfection. Well done and thank you!

  46. 11/20/2014 at 8:50 am

    is the batter suppose to be thick or thin?

    • Julie
      11/20/2014 at 4:45 pm

      It’s more on the thick side but not super cement-like thick.

  47. Kim
    11/21/2014 at 10:44 am

    This is the best thing I ever ate.

  48. Rita Ocasio
    11/22/2014 at 12:02 am

    I made as directed but substituted vanilla soy milk and it came out very good. Thank you!  (• ◡•)

    • Rita Ocasio
      11/22/2014 at 12:06 am

      Next time I’ll use coconut oil as it is the best for baking.

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