vegan brownie in a mug with ice cream on top

Learn how to make the best single serving Vegan Mug Brownie made with healthy ingredients in just 1 minute! Indulgent, fudgy and so delicious- this recipe is also gluten free, oil free and refined sugar free.

vegan brownie in a mug with a spoon

Say hellooooo to mug cake #4 for mug cake week: Vegan Mug Brownie! Made in the microwave and ready in minutes. Like, 2 to be exact.

She is the answer to satisfy any sweet chocolate cravings.

Rich, decadent, fudgy and just pure deliciousness. Let’s dive right in, shall we?

mug brownie ingredients on a tile

Healthy & Simple Ingredients

This recipe is especially special because it’s made with just 6 pantry staple healthy ingredients!

  • Drippy Nut Butter: Replaces the oil and gives a lovely fudgy texture. I love using tahini and peanut butter for this but you can use any variety you have on hand. I have also tried doing half nut butter and half apple sauce, the texture is slightly more dense but still delicious!
  • Coconut Sugar: Any granulated sugar of choice can be used here. If you prefer a richer, less sweeter brownie reduce by half.
  • Dairy Free Milk: No milk? No problem. Substitute with water! A tad less rich but still delicious.
  • Oat Flour: I have tested this with all purpose flour, gluten free all purpose flour and spelt flour with success. I have not tried it with almond flour and coconut flour so can’t guarantee it will work.
  • Cocoa Powder: Cacao powder can also be used.
  • Chocolate Chips: Add it into the batter and more on top!

Aaand if you have some vanilla extract, instant coffee, cinnamon and salt around add those in too! It really compliments the flavour of the chocolate.

How to Make a Brownie in a Mug

  1. Combine all the wet ingredients into a mug and stir well until combined.
  2. Add in the oat flour and cocoa powder and stir until there are no more lumps. If you have a little extra time, sifting the flours help with removing any of those pesky lumps of flour. Then, fold in the chocolae chips.
  3. Into the microwave it goes for 50 seconds. If it looks very undercooked just by looking at it, give it another 10 seconds.

And thats it! An ultra decadent single serving brownie, ready in 1 minute, crazy right?! Don’t forget to top it off with some maldon salt, vanilla ice cream or coconut whip cream for extra yumminess (kinda not optional??).

brownie in a mug with ice cream on top

Texture of Mug Brownies

This brownie is meant to be ultra fudgy but not pudding-y. You should still be able to detect crumbs so it’s not just raw batter. Because there is no egg or egg replacements used, there isn’t any structure so it is best eaten straight out of the mug.

If you prefer a more cake-y brownie, add in 1/8 tsp of baking soda or 1/4 tsp of baking powder. Adding a bit of leavening agent will help rise the brownie just a bit to achieve that texture.

This brownie is best eaten warm (after it’s been cooled for 2 minutes). As it cools, the texture tends to get more pudding like because it continues to steam as it sits in the mug adding more moisture. I also wouldn’t recommend re-microwaving it. If you do want to re-warm it, I suggest putting a damp paper towel over it and nuking it for just 10 seconds.

gluten free brownie in a mug with a spoon

More Vegan Mug Desserts to Try:

close up shot of healthy brownie in a mug with coconut ice cream on top

If you recreate this Fudgy Vegan Mug Brownie recipe let me know how you liked it by leaving a comment and rating below or by tagging me on Instagram @Okonomikitchen, I love seeing all of your tasty recreations!

Hungry for more? Be sure to subscribe to my newsletter and follow along on Instagram, Youtube and Pinterest for more deliciousness!

clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon
gluten free brownie in a mug with a spoon

Fudgy Vegan Mug Brownie

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

5 from 8 reviews

  • Author: Lisa Kitahara
  • Total Time: 2 minutes
  • Yield: 1 serving 1x


Single serving microwave vegan mug brownie made with healthy ingredients! Fudgy, chewy, melty chocolate goodness. YUM. 



Optional Add-ins: 



  1. Add peanut butter, coconut sugar, 2 tbsp non dairy milk and any of the add-ins in to a mug and stir until combined. Add in the oat flour and cocoa powder and stir until a batter forms. If the batter is too thick, add in the extra tbsp of non dairy milk. Fold in 1 tbsp of chocolate chips. Top with more chocolate chips if desired. 
  2. Microwave on high (1000 W) for 50-60 seconds. The tops should just be cooked it’s okay if the middle is slightly undercooked. Let it stand for 2 minutes (the brownie will continue to cook as you let it stand). Top with fancy salt, vanilla ice cream or coconut whip cream and enjoy!


  • *If you prefer a more cake-y texture, add in 1/4 tsp of baking powder or 1/8 tsp of baking soda. 
  • Helpful Equipment: 8 oz mug or bowl, 10 oz mug or bowlmini spatula 
  • Nutritional Information Disclaimer: Nutrition information is a rough estimate calculated on an online tool (Cronometer) without extra toppings.
  • Prep Time: 1 minute
  • Cook Time: 1 minute
  • Category: dessert
  • Method: microwave
  • Cuisine: vegan, gluten free


  • Serving Size: 1 serving
  • Calories: 468
  • Sugar: 34.6g
  • Sodium: 182mg
  • Fat: 21.9g
  • Saturated Fat: 6.4g
  • Unsaturated Fat: 12.6g
  • Trans Fat: 0
  • Carbohydrates: 58.6g
  • Fiber: 7.6g
  • Protein: 12.8g
  • Cholesterol: 0


Okonomi Kitchen is a participant in the Amazon Services LLC Associates Program. When you purchase something through my amazon affiliate links, I earn a small commission that helps me produce consistent content at no cost to you. Thank you for supporting my plant based kitchen!


About Lisa

I'm Lisa, a home cook, recipe developer and founder of Okonomi Kitchen. Here, you'll find a mix of classic and modernized Japanese recipes, and creative, plant-forward meal inspiration using seasonal ingredients. I hope to share more about Japanese cuisine and culture through food and recipes.

Related Recipes


Leave a reply

Your email address will not be published. Required fields are marked *

Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star


  1. So delicious and easy and vegan, better tasting than most non-vegan mug cakes! Had to make some subs based on what I had on hand, used black coffee instead of milk, peanut butter with a touch of olive oil to make runny, maple syrup instead of sugar, and wheat flour instead of oat. I did add the baking powder and cinnamon to enhance the flavor and texture, nice enhancement. Came together in minutes and the texture is soft and fluffy with some fudge pockets, and melted chocolate chips. So delicious! Added a scoop of oatly ice cream on top. Quick but so satisfying !

  2. Omg!! This came out SOOO good!! It’s fudgy and moist!! I made it with peanut butter, yuuummm!! Thanks!!

  3. Even after removing the sweetener, this was still DELISH! Until now, I have never tasted an actually GOOD mug cake until now. They are all either too sweet or have a really bad texture.
    I have a 700 watt like 10-year-old microwave, so I had to microwave it for 1 min 20 sec, but it was AMAZING.

  4. This recipe was super easy, I’ve made it so many times almost commîtes to memory! The ingredients are things I always have on hand so whenever I get that sweet tooth this is the winner! So so yummy, try it you want be upset 🙂

  5. This was so delicious and fudgey! I tried it with almond butter and now I can’t wait to try your recommendations of tahini or peanut butter. Thanks for a great recipe!

  6. So yummy! Used white flour as that’s all I had and tahini and it was so rich and fudgy! 🤤

  7. Such a great recipe! Subbed oat flour for whole wheat flour and the result was still a fudgy, easy and delicious mug brownie 🙂

  8. the perfect treat at the end of the day! perfect amount of fudgey-ness. I used half applesauce half almond butter with half the amount of coconut sugar and it was still so satisfying