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Home ❯ Recipes ❯ Vegan Dessert Recipes

Healthy Vegan Mug Brownie

Updated: 05/23/2025 · Author: Lori Rasmussen · This post may contain affiliate links

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Pin image to save on Pinterest.

This healthy vegan mug brownie is ready in minutes and has the perfect amount of chocolate-y goodness to quickly satisfy a craving! No eggs or dairy here. We're using mashed banana, nut/seed butter, oat flour, cocoa, and sweet chocolate chips for a fudgy, single-serving brownie that satisfies!

A spoon scooping up a bite of healthy brownie from a white mug.

Today's mug brownie recipe was inspired by my healthy banana brownies. Y'all really love those, and I do, too! There's just something about the moisture and extra sweetness of ripe banana combined with cocoa that tastes more complex and decadent than it really is.

Jump to:
  • Ingredients
  • How to Make a Vegan Banana Mug Brownie
  • Substitutions
  • FAQs
  • Top Tip
  • More Vegan Chocolate Desserts
  • Recipe
  • 💬 Comments

So when I found myself craving one of those brownies after lunch the other day, I figured I'd get to work on a single-serving version.

And it only took four test batches to get here. My chocolate craving was definitely satisfied!

You'll love this vegan mug brownie because it's:

  • quick and easy
  • made with 9 ingredients
  • contains no eggs, dairy, or oil
  • satisfying thanks to oat flour
  • contains 9 grams of fiber!
  • and just sweet and rich enough

RELATED: Love quick and easy mug recipes? Don't miss these other microwave desserts:

  • apple crisp in a mug
  • 5-minute mug granola
  • oatmeal mug cake
  • and this new banana mug cake!

Ingredients

Labeled photo of the ingredients needed for the mug brownie recipe.

See the recipe card below for amounts and full instructions. Here's a quick look at the ingredients you'll need:

  • cocoa powder - either regular unsweetened cocoa powder, preferred, or raw cacao powder will work.
  • very ripe banana - here's an insider tip: you only need 3 level tablespoons of mashed banana for one mug brownie, which you can usually get from half of a small banana. So, why not go ahead and make two healthy mug brownies? Be sure to use a banana that's very ripe and fragrant since it provides a decent amount of sweetness and moisture.
  • oat flour or rolled oats - currently I'm using this oat flour from Anthony's. If you don't have oat flour, simply place rolled oats in a blender and blend until the consistency of flour. Look for certified gluten free oats, if needed.
  • baking powder - this serves as the leavener and helps the mug brownie/cake cook through and rise. If you only have baking soda on hand, use less, about ⅛ tsp.
  • nut butter - any smooth nut butter you like is fine, such as almond, cashew, or peanut. Sunbutter is the best nut-free option.
  • non-dairy milk - I used unsweetened almond milk. You could also use coconut, soy, or oat milk.
  • granulated sweetener - regular sugar tastes best in this recipe, but I have also made it with coconut sugar and light brown sugar. Unfortunately, I can't recommend any others, such as low-sugar options. If you decide to experiment with another sweetener let us know in the comments!
  • vanilla and cinnamon- vanilla extract and a dash of cinnamon pair nicely with the banana and chocolate.

How to Make a Vegan Banana Mug Brownie

Dry ingredients in a bowl and wet ingredients in a mug.

In a standard, 10-ounce, microwave-safe mug, combine the nut butter, banana, milk, sugar, and vanilla.

In a separate bowl or mug, whisk the oat flour, cocoa, baking powder, salt, and cinnamon, if using.

Brownie batter stirred together in a mug.

Pour the dry ingredients into the mug with the wet ingredients, and stir until fully combined. Sprinkle chocolate chips on top.

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Healthy mug brownie fresh from the microwave.

Note: this recipe was tested in an 1100 watt microwave. Microwave ovens vary, so stay nearby and keep an eye on it the first time you try the recipe.

Begin by microwaving on full power for 50 seconds. Then microwave for another 10 to 20 seconds, depending on how much it rose and whether the center appears somewhat set. In my microwave, total cook time is 80 seconds. 

If using a smaller, older, or lower wattage microwave you may need to add more time, in 10 to 15 second intervals. The mug brownie should rise to the top of the mug near the end of that first 50 seconds, then sink back down a bit. This is normal and helps create the dense and fudgy brownie texture.

Let cool for 5 minutes, then enjoy as-is or topped with vegan ice cream or dairy-free whipped cream!

Substitutions

With such a small, specific recipe like this, even tiny adjustments can alter the end result quite a bit.

Each ingredient has a purpose, including the banana and nut butter. So while I would love to be able to say that this mug brownie is "flexible," I don't think it is. Using different flours, sweeteners, or replacing the banana will alter the flavor and texture.

But it's just a mug cake, after all! So if you're feeling bold, and want to play around with the ingredients, I say go for it!

A microwaved brownie with chocolate chips on top in a small white mug.

FAQs

What can I use instead of oats or oat flour?

Oat flour is the only one I've tested so far, but if you feel like experimenting, at least the stakes are low with such a small dessert! I'm sure another whole-grain flour or all-purpose flour will work with a few minor adjustments. Just keep in mind that it may not work perfectly on the first try.

Can I replace the banana?

The ripe, mashed banana adds important moisture, binding, and an extra bit of sweetness. Other possibilities are applesauce with ground flax seed, or aquafaba mixed with maple syrup, but I haven't tested these yet.

Can I bake it in the oven?

Yes, if you prefer not to use the microwave, you can bake the mug brownie in a 350 degree oven for around 16 minutes. Just make sure to use an oven-safe mug, ramekin, or similar dish. Since you'll have the oven on, you may prefer to make a full batch of these banana brownies. The leftovers freeze well!

Top Tip

Even though mug desserts are quick and easy to make, it's still important to measure accurately. Also, be sure to keep a close eye on it until you figure out the exact cook time for your microwave.

More Vegan Chocolate Desserts

  • drizzling dark chocolate sauce from a spoon over a jar
    Vegan Chocolate Sauce and Syrup
  • a stack of almond flour brownies showing their fudgy texture .
    Almond Flour Brownies
  • A stack of 5 peanut butter brownies.
    Vegan Peanut Butter Brownies
  • big stack of chocolate cookies
    Vegan Double Chocolate Chip Cookies

I hope you enjoy this vegan mug brownie. If you try it leave a comment below to let us know!

Recipe

Spooning up a bite of chocolate mug brownie.

Healthy Vegan Mug Brownie

Author: Lori Rasmussen, My Quiet Kitchen
This vegan mug brownie is quick to make, healthier than most, and has the perfect amount of rich chocolate flavor to satisfy a craving! No eggs or dairy here. We're using mashed banana, nut or seed butter, cocoa, non-dairy milk and chocolate chips. Ready in 10 minutes!
5 from 4 votes
Servings: 1 serving
Prep Time: 5 minutes mins
Cook Time: 1 minute min
Rest time: 5 minutes mins
Total Time: 10 minutes mins
Save on Pinterest Print Recipe

Ingredients

  • 1 tablespoon smooth nut butter such as almond, cashew, or peanut butter (stir very well so it's not too runny/oily) - Sub tahini or sunflower seed butter if desired
  • 3 tablespoons mashed very ripe banana - about half of a small banana
  • 2 tablespoons sugar - see Notes
  • 2 tablespoons unsweetened non-dairy milk, such as almond or oat milk
  • ¼ teaspoon vanilla extract
  • 3 tablespoons fine oat flour (20 grams) - see Notes for tips
  • 2 tablespoons regular cocoa powder
  • ¼ teaspoon baking powder
  • pinch of sea salt
  • dash of cinnamon, optional
  • small handful non-dairy chocolate chips - to sprinkle on top

Instructions
 

  • In a standard, 10-ounce, microwave-safe mug (a larger mug is fine, too), combine the nut butter, banana, milk, sugar, and vanilla. Stir well so that the nut butter is fully incorporated.
  • In a separate bowl or mug, whisk the oat flour, cocoa, baking powder, salt, and cinnamon. Pour the dry ingredients into the mug with the wet ingredients, and stir until fully combined. Sprinkle chocolate chips on top.
  • Note: this recipe was tested in an 1100 watt microwave. Microwave ovens vary, so stay nearby and keep an eye on it the first time you try the recipe.
    Begin by microwaving on full power for 50 seconds. Then microwave for another 10 to 20 seconds, depending on whether the center appears somewhat set. In my microwave, total cook time is 80 seconds. If using a smaller, older, or lower wattage microwave you may need to add more time in 10 to 15 second intervals.
    The mug brownie should rise to the top of the mug near the end of that first 50 seconds, then sink back down a bit. This is normal and helps create that dense and fudgy brownie texture.
  • Let cool for 5 minutes. Enjoy as-is or top with vegan ice cream or whipped cream.

Notes

Sugar: Regular cane sugar tastes best, but we've also tested light brown sugar and coconut sugar with good results.
Top Tips:
  • If you don't own a kitchen scale, fluff up the oat flour with a whisk or fork before measuring. Then scoop it up and level off the excess.
  • A smooth, glazed ceramic mug works best and allows the brownie to rise better (as opposed to a rough surface like pottery.
Baking Instructions: If you prefer not to use a microwave, you can bake the mug brownie in a 350 degree oven for 16-18 minutes. Make sure your mug is oven-safe. Test for doneness by lightly pressing the top, which shouldn't be wet.

Estimated Nutrition (per serving)

Calories: 360kcalCarbohydrates: 58gProtein: 9gFat: 14gSaturated Fat: 3gCholesterol: 0mgSodium: 170mgFiber: 9gSugar: 30g

Nutrition information is an estimate and will vary depending on the exact amounts and specific products and ingredients used.

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    Recipe Rating




  1. Deba says

    February 12, 2025 at 1:51 pm

    This is so so good, I may never need another choc recipe. Yeah sure, But really. Didn't have the choc chips and I didn't really miss them.
    This recipe saved me from slipping off the deep end. I may play with trying whole wheat next.

    Reply
  2. Carol says

    October 05, 2024 at 9:37 pm

    Delicious! Cake texture - perfect sweetness used coconut sugar. I didn't have any chocolate chips, but it would be even better with those on top and a scoop of ice cream. Ready in 5-10 minutes.

    Reply
a photo of Lori Rasmussen in her kitchen.

Hi, I'm Lori!

I'm passionate about flavor and simplicity. I share vegan recipes with a focus on both!

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