I’m all about simple, cozy desserts, and this easy microwave chocolate mug cake might just be my favorite quick fix. When I get a rare night to myself without the kiddos, I love making this chocolate cake in a mug. It’s warm, rich, and takes only about 6 minutes start to finish, which is just about as long as I can wait for something chocolatey and comforting! This quick chocolate mug cake is packed with gooey chocolate chips, has a soft, moist crumb, and satisfies my every late-night craving.
Top Reader Reviews
My grandson and I each made one today and they turned out sooo yummy!!!! So fun to make too!!
– Sarah E.
It was easy and amazing
– Ruby Richard
Chocolate Cake in a Mug
There’s nothing I love more than curling up on the couch, turning on my favorite show, and digging into this chocolate mug cake after a long day. It’s so rich and satisfying that you’d never guess it was made in the microwave! The texture is light and fluffy, while the cocoa flavor stays deep and bold thanks to quality cocoa powder.
One of my favorite things about this DIY mug cake recipe is how adaptable it is. Sometimes I swap in peanut butter, butterscotch, or even make it red velvet for a special twist. No matter how you change it up, you’ll always get a delicious, moist chocolate mug cake in just minutes.
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One Simple Tip!
For convenience, you can simply combine all cake ingredients directly in the mug instead of using a separate bowl. Using a bowl is helpful for mixing and preventing mess, but if you have a large enough mug, it works fine to skip the extra dish.
Chocolate Mug Cake Recipe
Equipment
- Kitchen Scale (optional)
- 12-16 ounce coffee mug
Ingredients
- ¼ cup all-purpose flour
- 2 tablespoons unsweetened cocoa powder *
- 3 tablespoons granulated sugar
- ¼ teaspoon baking powder
- ¼ cup whole milk **
- 2 tablespoons salted butter melted
- ¼ teaspoon pure vanilla extract
- ½ tablespoon mini semisweet chocolate chips ***
Instructions
- In a small bowl, whisk together the flour, cocoa powder, sugar, and baking powder.¼ cup all-purpose flour, 2 tablespoons unsweetened cocoa powder, 3 tablespoons granulated sugar, ¼ teaspoon baking powder
- Add the milk, butter, and vanilla. Stir to combine.¼ cup whole milk, 2 tablespoons salted butter, ¼ teaspoon pure vanilla extract
- Lightly spray a mug with cooking spray.
- Transfer mixture to prepared mug.
- Top with chocolate chips.½ tablespoon mini semisweet chocolate chips
- Microwave for 90 seconds.
Notes
- Don’t forget to spray your mug with cooking spray! I’ve found that butter flavor works the best, as it compliments the flavor of the cake. If you forget to spray, you’ll probably be scrubbing cake residue from your mug for quite some time.
- When measuring out your flour, don’t pack it into the measuring cup. Spoon then level the flour or you will have a dense mug cake.
- Microwave in 30-second increments or your mug might overflow. Still delicious, but a little messy.
- Just like ovens, all microwaves can be a little bit different from one another. If at the 90-second mark, your cake is still undercooked, continue microwaving in 10-second increments until it’s fully baked.
- If you place your fingertips on the top of the mug cake and a small amount of cake residue sticks to you, that means it’s perfectly baked and ready to eat. If you microwave your mug cake for too long, it will harden and not have the desired consistency. Be careful to not go over 90 seconds unless it’s truly undercooked!
- If at first your mug cake doesn’t turn out to be picture-perfect, that’s okay! Sometimes, even easy recipes like this need a little practice to get perfect. Plus, even if it’s not too pretty, it’ll still be delicious.
Why I Always Rest Mug Cake Batter
After years of testing mug chocolate cake recipes, I discovered that letting the batter rest for just 2–3 minutes before microwaving yields a noticeably fluffier, softer texture. I actually stumbled onto this trick by accident one night when I got distracted on a phone call and left the batter sitting in the mug. When I finally microwaved it, I was amazed at how much lighter and airier my chocolate mug cake turned out.
Why does this work? Resting the batter gives the baking powder time to react with the liquid ingredients, forming tiny air pockets that help the cake rise more evenly in the microwave. It’s such a simple step, but it transforms this easy chocolate mug cake into something you’d think was baked in the oven!
How to Make a Chocolate Mug Cake Step-by-Step
Prep: Gather the list of ingredients for this easy mug cake recipe. Melt the butter in the microwave.
Whisk the Dry: In a small bowl, whisk together ¼ cup of all-purpose flour, 2 tablespoons of unsweetened cocoa powder, 3 tablespoons of granulated sugar, and ¼ teaspoon of baking powder. Be sure to measure the flour using the spoon-and-level method to prevent a dense cake. Simply spoon flour into the measuring cup, instead of scooping and packing.
Add the Wet: Add ¼ cup of whole milk, 2 tablespoons of melted salted butter, and ¼ teaspoon of pure vanilla extract. Stir to combine.
Transfer: Lightly spray a 12-16 ounce coffee mug with cooking spray to prevent sticking. Then transfer the cake batter to the prepared mug.
Add Chocolate Chips: For an extra kick of chocolate, top with ½ tablespoon of mini semisweet chocolate chips.
Microwave: Microwave cake in 30-second increments, for a total of 90 seconds. You want to keep an eye on it so the batter doesn’t bubble over. If it’s not fully cooked at 90 seconds, continue in 10-second intervals. Be careful not to overcook, or it will become dry and chewy.
How to Store
In the (highly unlikely) event that you don’t finish this chocolate mug cake in one sitting, you can store it tightly covered with plastic wrap at room temperature for up to 1 day. Enjoy at room temperature, or gently reheat in the microwave for 20-30 seconds.
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