I haven’t abandoned my easy microwave mug cake series. I just took a short break because I didn’t have any ideas that really inspired me. Then when I was working with marshmallows for S’mores brownies, it made me think of hot chocolate. And that’s how I came up this hot chocolate mug cake.

The mug cake uses hot cocoa mix in the batter. You can throw some marshmallows into the batter too which will melt into the cake. And I added a few more marshmallows on top to more resemble hot chocolate.

I was pretty pleased with how this came out. Light, fluffy, and you could taste the hot chocolate flavor. This would be perfect any time of year, though I’m excited to make it during the winter.

Print Print Recipe

Hot chocolate mug cake

Yield: 1-2

Prep Time: 5 mins

Cook Time: 1.5 mins

Total Time: 6.5 mins


4 tablespoons all purpose flour
4 tablespoons white granulated sugar
1/2 tsp baking powder
1 egg
2 1/2 tablespoons hot cocoa mix
3 1/2 tablespoons milk
splash of vanilla extract
3 1/2 tablespoons oil
mini marshmallows (optional)


Combine all ingredients except mini marshmallows in an oversized coffee mug. Whisk well with a fork until smooth. Add 4-5 mini marshmallows into batter if desired. Microwave on high for 1 minute 30 seconds. Check to see if done by inserting knife and seeing if middle of cake is done. The outside of the cake even when fully cooked will look wet and slightly gooey. This is normal. If it needs longer, cook for an additional 30 seconds. Mine was done at 1 1/2 minutes. You don’t want to overcook it or it will become rubbery. You also want to keep in mind that the cake will continue to cook a little in the cup while it is cooling. Add additional mini marshmallows on top and let cake cool slightly before eating.


33 Responses to “Hot chocolate mug cake”

  1. Kay — April 27, 2012 at 6:08 am

    I love all of your mug cakes, this one looks delicious!

    • Kirbie replied: — April 27th, 2012 @ 10:40 am

      I like it too =)

  2. Amy — April 30, 2012 at 4:07 pm

    This is very yummy, but my oversized coffee mug must not have been oversized enough. I had a bit of a volcano! Put the next batch for hubby in a bowl and it did much better, but did take 2 1/2 minutes. I think I’ll split this between two regular mugs and see if that size works. I’ll definitely find a suitable cup because the flavor is great!

    • Kirbie replied: — May 1st, 2012 @ 8:37 am

      I’m glad you liked it though sorry to hear about the overspill. I’m not quite sure how many ounces my oversized mugs hold, but it’s quite a bit more than my standard mugs, so I definitely recommend you try splitting it into regular mugs next time and cooking them separately if you don’t have one really big oversized mug.

  3. Kelly — May 15, 2012 at 3:02 pm

    I bought marshmallows the other day just for this!! I love your mug cakes!! I actually mixed one up the other day and split it in half, putting the other half in a mug in the fridge to make it the next day! The only thing easier than a mug cake is a mug cake that’s already mixed and ready to be nuked.

    • Kirbie replied: — May 15th, 2012 @ 3:48 pm

      I hope you like this one! I was wondering what would happen if I put the batter in the fridge. Glad to know it works!

  4. Kelly — May 22, 2012 at 9:28 pm

    Finally made this–my favorite mug cake so far! I’m surprised how good the hot cocoa mix was!

    • Kirbie replied: — May 23rd, 2012 @ 8:44 am

      I really liked this too! I didn’t realize how quite unique the hot cocoa flavor is compared to regular chocolate.

  5. Amanda — July 9, 2012 at 11:46 pm

    This is by far one of my favorite ones! :D Except unfortunately, you need like mega-over-sized mug or else you still get some spew. :)

  6. Abby — August 8, 2012 at 1:46 pm

    I tried the hot chocolate mug cake today and it’s fantastic!! Thanks so much for all your recipes :)

    • Kirbie replied: — August 9th, 2012 @ 9:50 am

      I’m glad you like it. I have a bunch of mug cake recipes you can try!

  7. Christina — September 8, 2012 at 5:01 pm

    This was definitely one of the best regular ol’ chocolate mug cakes I’ve had, but WOW was it unhealthy! lol I thought it’d be about half the calories, carbs, etc. that it was! It was a lot though, so I saved half for later. Thanks for sharing!

    • Kirbie replied: — September 9th, 2012 @ 11:53 pm

      It makes quite a lot so yeah I would definitely just eat half at a time. Though it actually is about the same calories and fat as regular cake. It’s not worse than regular cake. And it doesn’t have frosting so if you normally eat frosting, then it’s actually less. =)

  8. The kids — October 7, 2012 at 7:21 am

    Mine tasted like rotten eggs…
    I added golden syrup and it masked the flavour but not the smell of rotten eggs
    not nice

    • Kirbie replied: — October 7th, 2012 @ 11:59 am

      I’m not sure why yours would end up tasting like that. As you can see from the comments, other people have made it successfully.

  9. katie — November 9, 2012 at 6:42 am

    Wow. Best recipe I’ve found so far! Makes a gorgeous snack! Yummy, thanks!

  10. kirstyn — November 18, 2012 at 10:59 pm

    I had a craving for chocolate and all we had in the pantry was hot cocoa mix so I went on a hunt for something quick and easy I could use that for and came across this. It was pretty good to help with the craving so thank you! :)
    Definitely have to watch out for the microwave though!

    • Kirbie replied: — November 19th, 2012 @ 8:51 am

      I’m glad you enjoyed this one!

  11. Kara — December 4, 2012 at 1:39 pm

    I will be making this later tonight for bedtime snack for my daughter and I. She is begging me to leave the comment now. So I did. Looking forward to it and I’ll leave a post make comment.

    • Kirbie replied: — December 4th, 2012 @ 1:54 pm

      I hope you two enjoy it!

  12. Shantelle — December 12, 2012 at 4:33 pm

    Making this in just a bit! I’ll let you know how the hubby and I like it! (;

    • Kirbie replied: — December 12th, 2012 @ 5:23 pm


  13. Madison — February 1, 2013 at 2:47 pm

    This was an amazing recipe! First one on this site that I have tried and it was so quick and easy. I had to cook mine for 20 extra seconds, but I will surely try many other recipes. Thankyou!

    • Kirbie replied: — February 1st, 2013 @ 4:53 pm

      Glad you enjoyed it. I have a lot of mug cake recipes for you to go through!

  14. Stephanie — April 18, 2013 at 2:29 pm

    I have a Rolo hot chocolate that would be FABULOUS in this… can’t wait to try it… This will be my sweet treat for the day! :)

    • Kirbie replied: — April 18th, 2013 @ 3:41 pm

      I didn’t even know there was Rolo hot chocolate! Sounds delicious

  15. Emily — June 13, 2013 at 6:19 pm

    I didn’t like this cake it taste nasty and like oatmeal. Very disappointed with this. Sorry but it wasn’t good! :(

    • Kirbie replied: — June 14th, 2013 @ 8:42 am

      it sounds like you didn’t mix everything completely. If you don’t have a smooth batter, you will end up with chunks of flour. As you can see by the comments, many people made it and it came out fine.

  16. milly — August 1, 2013 at 12:07 pm

    can i use baking soda instead of baking powder?

    • Kirbie replied: — August 1st, 2013 @ 9:45 pm

      Baking soda doesn’t produce the same rise, so it won’t be cake-like.

  17. Rachie — January 8, 2014 at 8:01 pm

    I was desperate for something sweet and I thankfully found your website! Thank you, you saved this poor college girl’s life Tonight!

    • Kirbie replied: — January 9th, 2014 @ 12:39 am

      that’s so great to hear! I hope you enjoy my whole mug cake collection!

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