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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
  • 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!

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