Kirbie's Cravings

Fudgy Mug Brownie

Super fudgy cocoa brownie in a mug! This single serving dessert cooks in the microwave and is ready in less than 5 minutes to satisfy your chocolate cravings.


After all my research to create my ultimate fudgy brownie recipe, I wanted to apply some of my new knowledge to create a super fudgy mug brownie.

I previously created this brownie mug cake which produces a chewy brownie but needs some wait time. Today’s recipe is so much easier. No wait time, no egg and no melting chocolate.

Texture of a Mug Brownie

As the title of the post states, this brownie is super fudgy. However, the crumb is also much looser than your typical brownie and you won’t be able to take the brownie out of the mug in one piece. It really needs to be eaten with a spoon in the mug.

The reason the crumb is so loose is because I didn’t use any egg in this recipe, which normally would act as a binding agent. I think it is too much of a hassle to try to use a fourth of an egg to make this mug brownie, so it’s better to eliminate the egg altogether.

This mug cake is best eaten warm a few minutes after it is cooked. The fudgy texture of the warm brownie helps hold the crumbs together. Once it cools, the brownie loses some of its fudginess and the crumbs become looser.

Size of a Mug Brownie

Because the brownie is so rich and fudgy, the single serving size will be small– just like your typical brownie slice. This recipe will only rise about 2/3 of the way up in an 8 oz mug.

It was really hard to take a photo and show the brownie since it sits so low in the mug, so for photo purposes I doubled the recipe. I don’t recommend doubling the recipe when you make it though because it cooks more evenly as a single serving. If you plan on making more than one serving, it is better to make two individual brownies rather than a giant one.

CHOPPED CHOCOLATE VERSUS CHOCOLATE CHIPS

I added chopped chocolate to the batter and on top so that there are melted chocolate pieces mixed in. You can use chocolate chips instead, but they won’t be as melty. The reason for using chopped chocolate is because it melts better. Chocolate chips are designed to not melt. I used Guittard dark chocolate for the chopped chocolate.

If you like this mug cake you might like my pumpkin brownie mug cake, too.

photo of a brownie mug cake

Fudgy Mug Brownie

Servings: 1
Prep Time: 4 minutes
Cook Time: 1 minute
Total Time: 5 minutes
Course: Dessert
Cuisine: American
A super fudgy brownie made in a mug and cooked in the microwave. This single serving dessert is ready in less than 5 minutes!
4.72 from 60 votes

Ingredients

  • 2 1/2 tbsp dutch process cocoa powder
  • 1 1/2 tbsp all purpose flour
  • 2 tbsp granulated white sugar
  • 2 tbsp oil canola, vegetable or olive oil
  • 2 tbsp water
  • 1 1/2 tbsp chopped dark chocolate

Instructions

  • In an 8 oz microwave-safe mug, add cocoa, flour and sugar. Whisk together with a mini whisk.
  • Add in oil and water. Whisk briskly until batter is smooth, making sure to break up any cocoa or flour lumps.
  • Add half the chocolate to the mug and briefly stir into batter. Sprinkle remaining chocolate on top of the batter.
  • Cook cake for about 40 seconds at full power. (I used a 1000 watt microwave. You may need to adjust time and/or power if you are using a different wattage.) Top of brownie should no longer be wet but may still be a little moist. Allow brownie to cool a few minutes and then eat the brownie while warm. 

Notes

  • Because the brownie is so rich and fudgy, the single serving size will be small-- just like your typical brownie slice. This recipe will only rise about 2/3 of the way in an 8 oz mug.
  • It was really hard to take a photo and show the brownie since it sits so low in the mug, so for photo purposes I doubled the recipe. I don't recommend doubling the recipe when you make it though because it cooks more evenly as a single serving. If you plan on making more than one serving, it is better to make two individual brownies rather than a giant one.
  • The crumb is looser than your typical brownie and you won't be able to take the brownie out of the mug in one piece. It really needs to be eaten with a spoon in the mug.
  • The reason the crumb is so loose is because I didn't use any egg in this recipe, which normally would act as a binding agent. I think it is too much of a hassle to try to use a fourth of an egg to make this mug brownie, so it's better to eliminate the egg altogether. If the loose texture really bothers you, you can can substitute 1 tbsp of water with 1 tbsp of whisked egg.
  • This mug cake is best eaten warm a few minutes after it is cooked. The fudgy texture of the warm brownie helps hold the crumbs together. Once it cools, the brownie loses some of its fudginess and the crumbs become looser.

The nutrition information provided are only estimates based on an online nutritional calculator. I am not a certified nutritionist. Please consult a professional nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.

Did you make this recipe?I'd love to see it! Mention @KirbieCravings and tag #kirbiecravings!

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151 comments on “Fudgy Mug Brownie”

  1. This was so good! I was worried about the sweetness but it wasn’t too sweet. I used this recipe to the T with 1 square of my fave Whittakers 50% dark Plum & Roasted almond . My oven can only go to 900Watt so I did it for 50secs which was perfect. Moist, fudge, dark and comforting. I topped it off with scoop of Vanilla

  2. This was definitely the best brownie mug recipe I’ve ever tried! I put it in the microwave for only 30s for that extra gooey ness and it was perfect! The only problem I would say is that I wouldn’t use olive oil as when I did I could taste it whilst eating the brownie which wasn’t pleasant but overall it was amazing!!

    • I’m glad you enjoyed it. I haven’t had issues tasting the olive oil. It may be because you only cooked it for 30 seconds. If you cooked it longer, I’m guessing the olive oil flavor would be less noticeable.

  3. Um wow. So it’s veryyyyyy rich. I just had one and it feels like I’ve had a meal aha. Very very good for a mug cake though. Do feel a bit sick to be honest. the chocolate chunks (not chips) make it good. Would recommend if you like rich goey brownies.

  4. If you have any doubts…don’t. It’s literally so soft and so chewy to almost melts in your mouth. I’ve done 30 seconds because my microwave is 1100 watts, and it’s amazing how even if you don’t cook it for long enough you won’t get poisoned because there are no eggs in the recipe. L0ve it!

  5. Oh my goodness where has this recipe been all my life! I’ve spent literal years making failed mug brownies (al come out cakey or dry or dense) and was near giving up altogether. The prospect of a warm, gooey brownie for one is too enticing though which is what brought me to this recipe. This is the one!! So chocolatey and melts in my mouth. I topped it with some melted chocolate and I’m loving every bite. Thank you!! 

  6. It was pretty good, but I would recommend NOT using really rich chocolate chips and using milk chocolate ones. It was incredibly rich, so I also would recommend halving the recipe. It would you a stomachache if you were to eat the whole thing, but it’s REALLY good. Thanks Kirbie!

  7. I loved this recipe so much, it was perfectly gooey and not too sweet! I did taste the olive oil, which wasn’t the best, but apart from that, really good!

    • you can try with canola or vegetable next time for a more neutral flavor. Olive oil does have a stronger flavor but some people like tasting olive oil in desserts.

  8. This was so good! I added a little bit of ground coffee when mixing the dry ingredients mm mmm. The only thing I was confused about while measuring was if it’s supposed to be Tablespoon or teaspoon , I know it said tbsp (I was taught at pastry school that if Tablespoon it should be capitalized -Tbsp vs tblsp. And teaspoon is always lowercase) other than second guessing myself if I made way too much, it wouldn’t matter anyway because it’s so good I wouldn’t mind having the extra haha! Thank you! 

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