Gooey and deliciously sweet yet sugar free healthy vegan chocolate mug cake that’s ready in under 90 seconds! Gluten free + perfect for kids!

Ever since making my vegan chocolate chip cookie mug cake, I’ve been mug cake obsessed! In fact, I even made a vegan funfetti mug cake that I shared in my healthy desserts YouTube video (the recipe is exclusive to that video 😉 ).
So what do I do next? Make a healthier vegan chocolate mug cake that’s sugar free!

Oh my goodness, just wait until you try this gluten free chocolate mug cake. It’s made with a homemade oat flour (but there are substitutions!), and sweetened naturally with stevia (I recommend the actual ground green leaf stevia, not the white powder).

Of course, I had to throw in some sugar free chocolate chips as well, which just makes the cake extra gooey and moist 😉 You won’t believe how deliciously chocolatey, decadent, and not to mention easy this healthy sugar free chocolate mug cake is!

Ingredients for a sugar free chocolate mug cake
What makes this healthy chocolate mug cake different from other chocolate mug cakes is that it’s entirely vegan, so you won’t see eggs or dairy in the ingredients list.

To make these vegan chocolate mug cakes, you’ll need:
- Oat flour (I recommend making your own, but if you don’t have oats, see the substitutions section below)
- Cacao powder
- Stevia (you can also use coconut sugar, but keep in mind, it won’t be sugar free then)
- Leavening agents
- Unsweetened applesauce
- Ground flaxseed
- Dairy free milk
- Sugar free chocolate chips (such as Lily’s Sweets)

How to make a healthy vegan chocolate mug cake
This recipe is so simple, you’re going to laugh. All you’ll need for “baking” equipment are a microwave safe mug and a spoon for mixing.
Then to start, mix together the dry ingredients in the mug.

Add in the wet ingredients and mix everything together until it’s well combined. Fold in the chocolate chips.

Pop into the microwave, following the directions in the recipe card below, and then serve!

Mug Cake Tips & Tricks
There are a few tips and tricks I have for ensuring that your vegan mug cakes come out perfectly.
- Start with heating your mug cake for only 60 seconds, then check its doneness. You might only need 15 seconds more, or you might need 30, but go in 15 second intervals to make sure you don’t overcook the cake.
- You can also bake these mini chocolate cakes in the oven at 350F for 15 minutes. Just make sure to use oven-safe ramekins!
- Patience! Allow the cakes to rest for at least a minute before digging in. The reason being is that the mugs will be very hot and the cake needs to fully set.
- Top with homemade Paleo vegan ice cream, coconut cream, some homemade vegan chocolate buttercream, or serve just as is!

Healthy Chocolate Mug Cake substitutions and add-ins
- If you don’t have oats and can’t make oat flour, you can also use gluten free 1:1 baking flour, all purpose flour, or cassava flour (just reduce the amount to 2 1/2 tbsp if you’re using cassava flour).
- You can use either stevia or coconut sugar or even regular sugar as well.
- If you can’t have chocolate, you can swap in carob powder and carob chips!
- Use any dairy free milk that you’d like: I recommend my homemade 5-minute non slimy oat milk.
- You can use chia seed in place of flaxseed.
- Add in fresh berries for a refreshing chocolate fruit cake!

Can you reheat a mug cake?
Absolutely! You don’t need to heat it for as long as you’ve cooked it before though.
I’ve found that a quick 15 second-20 second stint in the microwave does the trick to bring it back to its gooeyness if you’ve decided to refrigerate your chocolate mug cake.

I hope you love this vegan chocolate mug cake as much as I do! If you make it, be sure to let me know how it goes in the comments section below!
As always, I love to see your beautiful creations on Instagram and Pinterest, so be sure to tag me there!
Happy mug cake making!

More Healthy Vegan Desserts
Vegan GF Chocolate Chip Cookie Mug Cake
The Ultimate Vegan Chocolate Chip Cookies
Flourless Peanut Butter Chocolate Chip Cookies
Ultra Rich Paleo Vegan Chocolate Cake
Want to save this recipe for later? Add it to your favorite recipe board on Pinterest!

If you make something from The Banana Diaries, I would love to see your creations! Make sure to leave a review in comments section, as well as giving it a rating so that others may find the recipe. Also, follow along with me on Instagram, Pinterest, YouTube, and Facebook for more vegan recipe inspiration!
PrintHealthy Vegan Chocolate Mug Cake (Sugar Free + GF)

Gooey and deliciously sweet yet sugar free healthy vegan chocolate mug cake that’s ready in under 90 seconds! Gluten free + perfect for kids!Â
- Prep Time: 2
- Cook Time: 2
- Total Time: 4 minutes
- Yield: 1 1x
- Category: Dessert
- Method: Microwave
- Cuisine: American
- Diet: Vegan
Ingredients
- 3 tbsp ground oat flour
- 1 tbsp cacao powder
- 1 tsp stevia (or 1 tbsp coconut sugar if not doing sugar free)
- 1 tsp baking powder
- 1/2 tsp baking soda
- 3 tbsp dairy free milk
- 2 tbsp unsweetened applesauce (see Note)
- 1 tbsp ground flaxseed mixed with 2 tbsp water
- 2 tbsp sugar free chocolate chips (such as Lily’s Sweets)
Instructions
- In a large microwave safe mug, whisk together the oat flour, cacao powder, stevia (or coconut sugar, baking powder, and baking soda.
- Add in the remaining ingredients except for the chocolate chips, and stir to combine.
- Fold in the chocolate chips.
- Place the mug into the microwave and heat for 60 seconds to start. Let the mug cake rest for 10 seconds, then heat again for 1-2 15-second intervals (starting with the first, then checking to see its doneness after the first interval. The outer edges of the cake should be set. If they’re not, try a second interval).
- Allow the cake to rest for 1 minute. Serve with ice cream or coconut whipped cream.
Notes
If you don’t have oat flour, you can also use gluten free 1:1 flour, all-purpose flour, or cassava flour (if using cassava flour, only use 2 1/2 tbsp flour)
Keywords: healthy chocolate mug cake, vegan chocolate mug cake, chocolate mug cake, gluten free chocolate mug cake, sugar free chocolate mug cake

What can you use instead of applesauce? I cannot have apples.
Thanks and love your recipes, just amazing!
Oh not a problem! You can swap in the same amount in dairy-free yogurt or dairy-free cream (such as full fat coconut cream!)! Enjoy and thank you so much for making these recipes! 🙂
Can i use almond or coconut flour instead of the oat flour? If yes, how much should i use? Thank you 🙂
Hi Ashley! I actually haven’t tested this with almond or coconut flour, and don’t regular work with almond flour so I can’t speak to the results! I know that almond flour requires more of a binder and can be 1:1 then so if it were me experimenting, I would do the same amount of almond flour, but add an extra tbsp of ground flaxseed!