If you love chocolate as much as I do, this decadent gluten free mug brownie is cooked in a mug and makes the perfect treat. Ready in just 3 minutes, you can have a homemade moist chocolate brownie anytime!

A close up of the cooked gluten free mug brownie.

It is all about the quick chocolate fix here. I love brownies, but I am often lazy when it comes to making them. I have a fantastic gluten free brownie recipe on my blog…but often, I am busy creating other recipes.

This is also a great recipe for college students who want a fun treat to make in their dorm room. Mug cakes are easy because you only need a microwave and a coffee mug! This easy gluten free vanilla mug cake is another great microwave cake recipe!

I love making this recipe when it is too hot to use the oven in the summer. It is nice to enjoy cake without heating up the house!!

Why this is seriously the best gluten free mug brownie recipe:

  1. If you are like me and crave chocolate but don’t want to bake something, this easy brownie mug cake recipe is for you!
  2. This microwave brownie is full of rich chocolate flavor, and you can vary it with so many mix-ins.
  3. This recipe is perfect for those with food allergies. It is not only gluten free but dairy-free and egg-free too!
  4. It makes one mug brownie, so double the recipe if you think a family member will try to steal some from you :-). This also makes a great Valentine’s Day dessert!

This was perfect for dessert tonight with some whipped cream on top. I subbed the water with coffee. It was delicious.”

betty b., blog comment

If you love quick and easy desserts, you will want to check out all of my Gluten Free Mug Cake Recipes!

Allergen Information:

This recipe is very allergy-friendly. It is gluten-free, dairy-free, egg-free, nut-free, and soy-free.

Photos of the gluten free mug brownie ingredients.

Ingredient Notes:

For the full list of ingredients and amounts, please go to the recipe card below.

  • Gluten-Free Flour Blend—I have tested this recipe with King Arthur Measure for Measure GF, my DIY Gluten-Free Flour Blend, and Bob’s Red Mill 1 to 1 GF blend. That doesn’t mean others will not work; I just have not tested other flours.
  • Xanthan Gum – If your gluten free flour blend doesn’t contain a binder like xanthan gum or guar gum, please add 1/4 teaspoon.
  • Cocoa Powder – Many great brands of cocoa powder are gluten free. Just be sure to check the label.
  • Chocolate Chips – Use any flavor of chocolate chips or even chocolate chunks!
  • Coconut Oil – I love the flavor of coconut oil added to this gluten-free microwave brownie, but you can use any light oil.
  • Vanilla Extract – Use pure vanilla extract or imitation. It won’t matter in this recipe.


  • Make it sugar-free! Swap the sugar for Monk Fruit Sweetener to make this gluten-free mug brownie sugar-free. It should be a 1:1 swap.
  • Make this mug brownie recipe gum-free (no xanthan or guar gum) using my DIY Gluten Free Flour Blend.
  • For no off taste from the coconut oil, use Canola Oil.

Step-By-Step Photos and Direcctions:

Are you ready to give this delicious recipe a try?

The mug brownie dry ingredients in a glass bowl.

Step 1: Add the dry ingredients to the mug and mix well. Note that you can mix all of this up in your mug.

I find that the dry ingredients don’t get mixed, so some flour is stuck around the edges when you eat the cake. I mix the ingredients in a bowl and then add them to my mug to fix this.

The dry mixed mug brownie ingredients in a glass bowl.

This is what your dry ingredients will look like mixed up. Add in the chocolate chips.

The wet and dry mug brownie ingredients ready to mix.

Step 2: Mix the wet ingredients with the dry ingredients.

The brownie batter in the mug.

📢 Sandi says: Every gluten-free flour blend has a different starch-to-grain ratio. The brand of gluten-free flour you use will affect the moisture of the batter. If your cake batter is too runny, add more flour, and if it is too thick, add more liquids.
Read Why Gluten-Free Flour Blends Vary to learn more about this.

Step 3: Put the mug into your microwave and cook for 90 seconds on high. Actual cooking time will depend on the size of your mug, its depth, and how wide the base is. You may need to cook it longer using a tall mug with a narrow base.

You will know your gluten free mug brownie is slightly firm to the touch.

The cooked mug brownie in the mug.

Top with vanilla ice cream, hot fudge, or some of the following mix-ins and toppings ideas.

A spoonful of cooked gluten free mug brownie.

Try these tasty mix-in ideas:

  • Use different flavors of chocolate chips, like white chocolate and salted caramel chocolate chips.
  • Add in walnuts or pecans.
  • Why not add some M&Ms? It will add some fun color!
  • Put a tablespoon of peanut butter in the middle of the cake batter for a gooey peanut butter middle.

If you love mug cakes as much as we do, check out all of my easy gluten free mug cake recipes! I am also a huge fan of this easy Gluten Free Blueberry Mug Muffin recipe.

Frequently Asked Questions:

What brands of cocoa powder are gluten free?

I love to use Rodelle, Anthony’s, and Ghirardelli brands of gluten free cocoa powder.

Why did the mug cake turn out gooey?

Usually, if your cake turns out gooey, it doesn’t cook long enough in the microwave. Cooking time will vary depending on your mug size and how wide the mug base is.

How do you know when the mug brownie is done cooking?

Your mug cake cooking time will vary depending on the size of your mug. The cake will be firm to the touch when it is done cooking.

How long will this brownie keep fresh?

These mug brownies will keep fresh for up to 3 days in an airtight container or up to 4 months in the freezer.

A cooked brownie mug with vanilla ice cream and pink and red heart sprinkles.

More Gluten Free Mug Cakes:

Love This Recipe?

If you made and enjoyed this recipe, I would be incredibly grateful if you could leave a comment below. Please include which flour blend you used. This will help others know this recipe is delicious. Thank you!

A close up of the cooked gluten free mug brownie.

Gluten Free Mug Brownie

Sandi Gaertner
A moist and delicious chocolate gluten free mug brownie recipe that cooks in the microwave in 3 minutes.
4.87 from 15 votes
dairy free allergen icon
an egg free allergen icon
gluten free allergy icon
nut free allergen icon
soy free allergy icon
Prep Time 1 minute
Cook Time 3 minutes
Total Time 4 minutes
Course Gluten Free Cake Recipes, Gluten Free Dessert Recipes
Cuisine American
Servings 1
Calories 479 kcal


  • 2 ½ tablespoons cocoa powder * see note
  • 1 ½ tablespoons gluten free flour blend * see note
  • 2 tablespoons cane sugar
  • 2 tablespoons light oil * see note
  • 2 ½ tablespoons water
  • ½ teaspoon pure vanilla extract
  • 1 tablespoon chocolate chips


  • In a small bowl, add the dry ingredients and whisk to blend.
  • Add in the wet ingredients and the chocolate chips and mix well.
  • Pour into your favorite coffee mug.
  • Microwave on high for 90 seconds. If the brownie feels firm to the touch, it is ready!
  • Top with vanilla ice cream.


  1. I have tested this recipe with King Arthur Measure for Measure GF, Bob’s Red Mill 1 to 1 GF blend, and Authentic Foods Multi Blend. That doesn’t mean others will not work. I just have not tested other flours.
  2. If your gluten free flour blend doesn’t contain xanthan gum or guar gum, please add 1/4 teaspoon.
  3. There are many gluten free brands of cocoa powder. I like Anthony’s and Ghirardelli brands. Always check the label to make sure the cocoa powder you choose is gluten free!
  4. This mug brownie will keep up to 4 days in an airtight container or up to 4 months in the freezer.


Please know that every gluten free flour blend has a different starch to grain ratio. If you use a blend I didn’t test, you may need to adjust your moisture levels in your baked goods.


Serving: 1gCalories: 479kcalCarbohydrates: 49gProtein: 4gFat: 34gSaturated Fat: 7gTrans Fat: 1gCholesterol: 2mgSodium: 16mgPotassium: 191mgFiber: 6gSugar: 34gVitamin A: 34IUVitamin C: 1mgCalcium: 42mgIron: 2mg
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Nutrition Disclaimer

Nutritional information is an estimate provided to you as a courtesy. You should calculate the actual nutritional information with the products and brands you are using with your preferred nutritional calculator.

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Recipe Rating


  1. Made this recipe for dessert tonight. It tasted fine but was overcooked and hard as a rock using the cooking time the recipe recommended. So I scraped what I could from the mug to eat it. I’ll try it again, lowering the time by 30 seconds and hope that’ll work!

  2. 4 stars
    The top of your recipes says it takes 3 minutes to cook. Since I was on my phone and having a hard time with all of the pop-up ads, I looked at the top and then cooked it too long.

    1. To ask for clarification, you were in the recipe card and there were pop up ads? There shouldn’t be. Usually you can hit jump to recipe and by pass ads, except the little video, which you would just click the x to close. Sorry for the questions, I need to tell my ad network of this issue and I want to make sure I fully understand what you saw.

  3. Is it 90 seconds in the microwave or 3 minutes? I see both written here and that makes a big difference!

    1. I looked through the entire post and it says both in the step by step directions and recipe card to cook the cake for 90 seconds. The title is 3 minutes because it includes the time to put the ingredients together to make it.

  4. 5 stars
    this was such a yummy treat. Instead of water I used leftover cold coffee. Topped with some coconut whipped topping, it was a decadent dessert, and so very easy.

  5. This is, indeed, a fast chocolate fix! Like a true addict. Hahahaha.
    I loved making mug cakes when I still used eggs. But when i found out that that wasn’t possible anymore… The mug cakes where gone too.
    So, i am really happy with your recipe!
    It meets all dietary requirements.
    Thank you for sharing!

  6. Hi! Recipe looks delish! Do you think I can pre mix about 10 servings worth by just multiplying inged. by 10? Or do I need to adjust some measurements? Thanks!

  7. 5 stars
    Very successful. I reduced the sugar a bit and added some caramel stevia instead. Also substituted half a tablespoon of flour for almond flour.

  8. 5 stars
    This was the best mug brownie I’ve ever tried. Thanks for the great recipe! I’m going to have to stop myself from making it too often =)

  9. 5 stars
    Yummy! So glad to enjoy this easy to make brownie. And just the right serving size too. I used Rodelle chocolate and it turned out absolutely perfect!

  10. 5 stars
    This was the perfect treat to satisfy my sweet tooth today. I got all the rich chocolate flavor I was craving in just a few minutes. Fabulous!