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Chocolate Fudge Mug Cake

I am going to hazard a guess and say you do not want or need any preamble to this recipe for a Chocolate Fudge Mug Cake. So really, I am not going to give you much of one. Suffice it to say that the benefit of a one-serving chocolate cake in a mug are many. Those of you who have been around keto and low carb for a while might be questioning why I felt the need to make a version of something that is all over the interwebs. Well, if I got a dollar for every time someone said that wanted a chocolate mug cake recipe that worked or wasn’t dry or tasted good, I’d be a rich woman. So my hope is that I have fixed whatever Chocolate Mug Cake crisis folks were experiencing with this version.

Chocolate Fudge Mug Cake | Carrie Brown

Now you can have Chocolate Fudge Mug Cake in a couple of minutes. And – maybe more importantly – you do not have another 7 or so pieces staring at you from the kitchen counter. Nope, this is one and done. The effort required to get up and make a second one is a lot more than merely slicing another piece from a large cake, so this Chocolate Fudge Mug Cake is inherently self-limiting.

Chocolate Fudge Mug Cake | Carrie Brown

And you can have your cake in a matter of minutes. Which is a big win for busy peeps who just need fast delicious keto meals to power them through the day. This Chocolate Fudge Mug Cake is both fast and delicious. Of course it’s basically a chocolate omelet if you think about it, so yes, you can totally eat it to break your fast at whatever time that is if you so fancy. I dare you – take the ingredients to the office and make one in the microwave in the kitchen and see what reaction you get.

Chocolate Fudge Mug Cake | Carrie Brown

This Chocolate Fudge Mug Cake is light and dense and rich all at the same time. Also, moist. And for those of you who just cannot get on with that word, let’s just say this Chocolate Fudge Mug Cake is not dry. It might just become your favorite go-to I-need-a-little-something-after-dinner thing.


Chocolate Fudge Mug Cake

Author: Carrie Brown | Prep time:  2 mins   |   Cook time:  2 mins  |   Total time:  4 mins  |  Serves: 1

What You Need


What You Do

  1. Melt the butter gently in a bowl in the microwave. Remove.
  2. Sieve the cocoa powder, sweetener, and sea salt directly into the bowl with the melted butter and stir well until batter is completely mixed.
  3. Add the vanilla extract and egg and stir until well combined.
  4. Add the baking powder and stir well.
  5. Pour into a mug (see Top Recipe Tips below)
  6. Microwave on high for 2 minutes. I use a 1000w microwave. If yours is more or less than that adjust cooking time accordingly! (Oven instructions below)


Top Recipe Tips

  • You *must* use a mug that is at least twice as tall as the amount of cake batter you have. The cake rises epically upon heating and then collapses back down. If you do not use a big enough mug you will have a big ol’ mess to clean up, and no one wants that. Especially you.
  • You can mix this whole thing up in the mug itself, but I just find it easier to make it in a bowl or jug and pour it into the mug for cooking. It also makes for a much prettier end result, but if you care more about one less thing to wash up than a prettier cake, mix it up in the mug itself. Just make sure you use a big enough mug.
  • I use a 1000w microwave. If yours is more or less than that adjust cooking time accordingly! It’s a very hardy recipe, so you can over-cook and not ruin it. If it seems under-cooked just pop it back in the microwave for increments of 20 seconds until done.
  • If you do not have a microwave, bake for 15 – 20 minutes at 350 degrees.


Helpful Cooking and Recipe Links


Podcast Episodes and You Tube Videos



  • Don’t. Just buy the correct ingredients and you, too, shall have a fabulous outcome!
  • Xylitol or allulose or erythritol are the sweeteners I recommend because they work very well. You can use any other sweetener you like, but I cannot guarantee the results if you choose to use something different. In low carb and keto baking sweeteners are generally not interchangeable if you want great results.


Chocolate Fudge Mug Cake | Carrie Brown



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  • geraldine denise kussTerrific recipe! Really enjoyed it!ReplyCancel

  • JenniferIs there a benefit to adding the baking powder with the egg instead of with the dry ingredients? Just wondering if it will not mix in as well.ReplyCancel

  • Petra JorgensenThere’s no flour of any kind needed for this? I usually see almond flour included in these kind of recipes.ReplyCancel

    • MaryNo flours! I love that about this recipe. That makes it lower carb, and it has a great texture.
      I’m eating it now and it’s delicious. :)ReplyCancel

  • MelodyWill there be a mug recipe book coming out in your future, and more importantly, OURS?ReplyCancel

  • LizHi Carrie! We’re big fans & would like to thank u for all u share & for your great podcasts with Carl, on 2 Keto Dudes!
    I just made these microwave fudge cakes for Easter dinner tonight with some cream cheese keto frosting & Hubby was thrilled at how good they were for quick microwave keto cakes….he says this is a keeper recipe for sure! Thanks for all the great recipes & for this great low-carb chocolate dessert for our Easter celebration….who needs all that sugary traditional Easter chocolate when u can have something just as yummy! :) LizReplyCancel

  • Lemon Sauce » The Real Carrie Brown[…] Chocolate Fudge Mug Cake […]ReplyCancel

  • 2 Keto Recipe Reviews and 1 Keto Recipe Experiment[…] next recipe I am sharing is by Carrie Brown titled “Chocolate Fudge Mug Cake“. If you are craving chocolate cake that has NO types of flour in it than this recipe is for […]ReplyCancel

  • Deborah MeggisonI finally tried this last night. It’s absolutely scrumptious, why did I wait so long? Perfect treat after a long week.ReplyCancel

  • Rosemary LeeYum! Totally delicious! Many thanks from Scotland!ReplyCancel

  • SusanJust made two of these out of this world mug cakes!! Delicious. Thank you for this recipe!ReplyCancel

  • ElenaI have enjoyed this recipe lots of times and recently started using it as chaffle batter! The recipe makes 3 chaffles – if you try to make only 2 it will overflow and make a big mess! Then I top with whipped cream and raspberries or use 2 to make a whoopie pie or ice cream sandwich.  ReplyCancel

  • JeanneMade it once, then couldn’t stop – EVERY night!  It’s that good…ReplyCancel

  • LynnWell, Carrie, we’ve just met.  I have two of your cookbooks and am pretty active now on your Facebook.  I’m an old girl, but I haven’t done much cooking, avoided it really.  I’m smitten.  I made this mug cake and it is awesome.  I did the easy way, right in the mug, but I went back to the recipe twice and checked it online because there was no flour. It was really really good – I have sweet tooth and it gave me my fix. ReplyCancel

  • TraciThis has become my go-to mug cake but today I made it x4 and put it in a 9” round casserole in the microwave for about 4 minutes and it came out wonderfully. I added a stevia cream cheese frosting that i found on pinterest and it is really satisfying my cake craving. Thank you for this easy recipe with wonderful flavor and texture. I really love all your recipes.ReplyCancel

  • TraciThis has become my go-to mug cake because its delicious and no nut flours. Today I multiplied it x4 and put it in a 9” round casserole in the microwave for about 4 minutes and it came out wonderfully. I added a stevia cream cheese frosting that i found on pinterest and it is really satisfying my cake craving. Thank you for this easy recipe with wonderful flavor and texture. I really love all your recipes- they are reliably delicious and healthy.ReplyCancel

  • Linda AndersonCarrie I love your recipes, but do you know how many carbs in this mug cake?ReplyCancel

  • Linda AndersonCarrie, I love your recipes, how many carbs for this mug cake?ReplyCancel

  • SylviaCarrie, could I substitute coconut sugar for the xylitol in this recipe? Meds I am on don’t allow me to have alcohol based products, so I am looking for an easily accessible product.  Thanks in advance.ReplyCancel