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Ultra fudgy flourless brownie in a mug that’s cooked in just 1 minute! It’s a paleo and grain free easy microwave brownie recipe that tastes so decadent.

Flourless brownie in a mug with a spoon
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Question: does it defeat the purpose of a microwaved mug dessert if you make it twice a day, everyday? ASKING FOR A FRIEND. They are just too easy to make, so fun to eat out of a mug, and you can’t beat how dangerously quick they are to make. I made this flourless mug brownie several times already this week because it’s that good!

Flourless Brownie in a Mug Recipe

I almost called this microwave mug brownie recipe “paleo chocolate mug cake” or “flourless chocolate mug cake.” However, the texture turned out fudgier and slightly denser than cake. After tasting it multiple times (I couldn’t stop), I realized that that it was definitely a brownie and a very good one! It’s just so amazing and the single serving size is so perfect for IMMEDIATELY fulfilling your chocolate cravings.

close up of paleo mug brownie with whipped coconut cream
spoonful of flourless mug brownie

How to Make Paleo Mug Brownie

The instructions for this microwave mug brownie recipe is so simple and easy:

  1. Combine all ingredients and whisk together until smooth.
  2. Grease the inside of your favorite mug, and pour the batter in.
  3. Microwave for 60-90 seconds.
  4. Cool for 5 minutes before digging in! You can top with your favorite toppings if you’d like.

The microwaving time depends on how wide your mug is and the power of your microwave. This flourless mug brownie is ready when the center is still slightly jiggly and that’s what make it so fudgy. I would check after 60 seconds in the microwave, then add more time if it needs to be cooked more.

Ways to Enjoy This Easy Microwave Brownie Recipe

This easy microwave brownie recipe will yield 1 large serving, but you can definitely stretch it to 2 servings because it’s rich and so satisfying. This is especially true if you are serving it with optional add-ons to stretch it even further. Here are some ideas on ways to enjoy this paleo mug brownie:

  • with vanilla ice cream
  • with whipped cream or whipped coconut cream
  • topped with chocolate chips (I love these dairy free ones) or shaved chocolate flakes
  • sprinkled with powdered sugar
  • topped with fruits like berries
  • drizzled with chocolate syrup or caramel sauce
  • drizzled with nut butter
  • topped with chopped nuts

Whether you want to call this a flourless mug brownie or flourless chocolate mug cake, it’s so tasty and wonderful. There’s honestly nothing like digging your spoon into a warm and fudgy chocolatey goodness!

microwave mug brownie recipe warm and soft

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4.92 from 12 votes
Servings: 1 large serving

Flourless Brownie in a Mug (Paleo, Grain Free)

Ultra fudgy flourless brownie in a mug that's cooked in just 1 minute! It's a paleo and grain free easy microwave brownie recipe that tastes so decadent.
Prep: 2 minutes
Cook: 1 minute
Cooling time: 5 minutes
Save this recipe!
Get this sent to your inbox, plus get new recipes from us every week!

Ingredients 

Instructions 

  • Add all ingredients to a bowl and whisk together until smooth and just combined.
  • Grease the inside of a standard 12oz or 16oz mug.
  • Pour the batter into the mug.
  • Microwave for 60-90 seconds. Check after 60 seconds. The center of the brownie should be slightly jiggly.
  • Cool for 5 minutes then dig in with a spoon! Feel free to add optional toppings like ice cream, whipped cream, chocolate chips, chopped nuts, berries, and more.

Nutrition

Serving: 1mug brownie, Calories: 297kcal, Carbohydrates: 30g, Protein: 9g, Fat: 20g, Saturated Fat: 14g, Cholesterol: 164mg, Sodium: 146mg, Potassium: 308mg, Fiber: 5g, Sugar: 15g, Vitamin A: 238IU, Calcium: 45mg, Iron: 3mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Tried this recipe?Leave a comment below or tag @whatgreatgrandmaate!
What Great Grandma Ate / Jean Choi is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.

Regarding other affiliate links and affiliate relationships: In order for me to support my blogging activities, I may receive monetary compensation or other types of remuneration for my endorsement, recommendation, testimonial and/or link to any products or services from this blog. Thank you for your support and understanding.

Jean Choi

Iโ€™m a food lover and recipe developer living in Southern California. I love to share simple and approachable gluten-free recipes that are healthy but never sacrifice on flavor.

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38 Comments

  1. Meg says:

    4 stars
    Followed the recipe to a T except subbed honey for maple syrup. Turned out like a rich spongy chocolate cake. I really enjoyed it. Donโ€™t know if I over mixed or something and that made the texture not turn out brownie-like. Definitely would make again though, it was delicious.

    1. Jean Choi says:

      Thanks so much for leaving a review!

  2. Lex says:

    5 stars
    This was yummy, and easy to make. Thank you, Jean! And I was surprised how it came out so well, without any flour! I subbed avocado oil, and mixed everything in a tall mug, to save on time and dishes. =) I also added a few butterscotch chips on top, before cooking. Yum yum!

    1. Jean Choi says:

      Oooo butterscotch chips sound AMAZING. Thanks so much for trying my recipe, Lex!

  3. Elizabeth Snyder says:

    5 stars
    This is such an amazing recipe. It SAVED my hubby and I last night when we were craving chocolate but didnt have chocolate chips to make my typical molten lava cakes. I personally don’t use microwaves but it was a DAY so we broke our rule. Would love to understand if anyone else tried to bake this in the oven, its going to turn into a go to for us!

    1. Jean Choi says:

      That’s amazing! I love that. I think you can try to bake it in the oven at 350 for 15-20 minutes. Thanks so much for leaving a review!

  4. Miles says:

    5 stars
    Second time I give a mug brownie a try and this recipe worked out much better than last one which was from another site (it turned out more gooey, like fudge instead of a brownie). I think I used too much oil this time though, didn’t have coconut oil and used olive instead and even after microwaving the olive oil taste was too strong. However it wasn’t completely a failure since at least it looked like a brownie and it was very fluffy, I also added some blueberries to the batter, and when it was all done I drizzled with some chocolate sauce which made it taste much better. I’ll probably use this recipe again in the future, but with actual coconut oil next time and hopefully I’ll be more successful ๐Ÿ™‚

  5. Angie says:

    5 stars
    This was quick and easy and hit the spot perfectly! The texture was perfect and surprising given the ingredients. What a great way to help a chocolate craving. I used 2 tablespoons of maple syrup instead of 3, wasn’t very sweet but it was super rich and absolutely divine! I dropped some walnuts on top while it was cooling. Yum!

  6. Sara says:

    This is the best mug cake recipe! Sometimes I add some chocolate chips, but I always do a dollop of peanut butter!
    Thanks so much for the recipe!

    1. Jean Choi says:

      Sounds wonderful! Thank you so much.

  7. River says:

    Can I sub the coconut oil for a nut butter?

    1. Jean Choi says:

      I wouldn’t. You can try butter, ghee, or another oil though!

  8. Andrus says:

    5 stars
    I have been eating (and LOVING) this recipe for the past two years now, so itโ€™s about time I show some love! This has been the most perfect sweet โ€œfixโ€ that doesnโ€™t make me feel like Iโ€™ve gone overboard with the splurging. Itโ€™s so delicious. I usually do 1 TBS for date syrup instead of the maple syrup, and it turns out great. I also add 1 TBS of whatever nut butter I have, and so cocoa nibs on top. YUM! Thank you for this recipe!

    1. Jean Choi says:

      Thank you SO much!!

  9. Christin says:

    5 stars
    Best brownie in a mug Iโ€™ve ever made. This onesโ€™ a keeper. Thank you so much!

  10. Coriander says:

    5 stars
    I’ve made this dozens of times, what a great recipe!
    I prefer less sweet desserts, so I use 1 tbs. maple syrup. I find that using a smaller egg and leaving the cake in the microwave to rest for a few minutes after cooking result in a very fluffy texture as opposed to a slightly spongier one that comes with very large eggs and no resting time. I always put a good scoop of coconut milk mint chip ice cream on top to make it a party.
    Thanks for developing and sharing this recipe, it’s a real treasure.

    1. Jean Choi says:

      Thank you so much!! I HAVE to try with mint chip ice creamy like you said. Sounds DIVINE.