Chocolate Fudge Mug Cake

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A chocolate fudge mug cake that works?!?
I save recipes every single day. Many are dinner recipes, but the majority of the recipes I save are desserts. I have dessert recipes saved from years ago that I’ve never made, and will continue to save them to this day.
mug cake that works
The reason I don’t make them is because I don’t want to eat a whole cake. Or pie. Or batch of cookies. I do occasionally make things and take them to friends. Seriously, if you’re a good friend of mine, you know it because I have definitely made you a surprise dessert.
mug cake that works
But sometimes, I just want to eat a homemade dessert in a single portion. And a mug cake seems like the perfect solution to that, right? I already have to the ingredients, and it only takes a few minutes. Perfect!
Except if you’ve ever made a mug cake, you know what a disappointment it can be. Overcooked, undercooked, spongy, dry, eggy, slimy. These are only some of the things that can describe most mug cake recipes.
I’ve tried a lot of them and finally stumbled upon a recipe that is good and works well, with two key ingredients: self-rising flour and club soda. Also a missing ingredient: the egg.
If you think about most dessert recipes, one or two eggs is enough for a batch of cookies or small cake. So why would one egg work for a single serving? It doesn’t, so scrap it.
Now the real trouble with mug cakes is that every microwave is different. And not in the way that ovens are different. Truly different. So for this to work, you’ll have to experiment with your settings, which may mean a wasted mug cake or two. I made this on power level 7 for exactly two minutes, and it was perfect. I can tell you after years of experimenting that even though most recipes will tell you high power, high power is too high. For a mug cake recipes that works, start at least one level lower than high, maybe two.
Serve this with a dollop of whipped cream, a scoop of ice cream or nothing at all. It is decadent enough all on its own.
mug cake that works

Chocolate Fudge Mug Cake

A chocolate mug cake that works is perfect when you want a dessert, but don’t want to make a whole cake. Decadent, fudgy, and indulgent.
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Prep Time 5 minutes
Cook Time 3 minutes
Calories 435 kcal


  • Microwave
  • Mug


  • 2 tablespoons butter
  • 1/4 cup self rising flour
  • 2 tablespoons cocoa powder
  • 2 tablespoons sugar
  • 1/2 teaspoon vanilla extract
  • 3 tablespoons club soda at room temperature


  • Put the butter in a mug 10-12 ounce microwave safe mug. Microwave for 20-30 seconds until melted.
  • Add the flour, cocoa, sugar, and vanilla and whisk.
  • Add the club soda and whisk until smooth.
  • Microwave on medium high heat for about 2 minutes. Check to see if the cake is done. The top will be puffy and slightly firm. If not, continue microwaving in 15 second intervals until done.
  • Let cool for a few minutes, top with whipped cream, ice cream, or powdered sugar.


*The right size mug makes a difference. 10-12 ounces is perfect. 
*I’ve made this recipe with store-bought self rising flour, as well as my own homemade version. The store-bought works infinitely better — don’t bother with a DIY version. 
*If your club soda is at room temperature, the cake will rise much better. 


Calories: 435kcalCarbohydrates: 53gProtein: 6gFat: 25gSaturated Fat: 15gPolyunsaturated Fat: 1gMonounsaturated Fat: 6gTrans Fat: 1gCholesterol: 60mgSodium: 212mgPotassium: 195mgFiber: 4gSugar: 25gVitamin A: 700IUCalcium: 27mgIron: 2mg
Nutrition information is only an estimate provided by an online nutrition calculator. View full nutrition disclousre.
Tried this recipe?Let us know how it was!

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