These skinny mug brownies under 100 calories are a quick, chocolatey treat made in the microwave in about 1 minute. Soft, light, and perfect when you want something sweet without the guilt.
Skinny Mug Brownies (Under 100 Calories)
2026 Update: This recipe now includes better microwave timing and texture tips so you get the best result every time.
Calling all chocoholics 🙋♀️ — this one is for you. These skinny mug brownies are under 100 calories and made in about a minute. Yes, really.
Everything gets mixed right in a mug, popped into the microwave, and just like that, you have a warm chocolate dessert ready to go.
I originally sweetened mine with Truvia, but you can use your preferred sweetener. If you need a gluten-free option, almond flour works great here.
What to Expect (Important)
This is a low-calorie brownie, so the texture is different from traditional brownies.
- It will be soft and slightly spongy
- It is not fudgy or dense
- The flavor is chocolatey but lighter
If you’re expecting a rich bakery-style brownie, this will feel different. But for a quick, under-100-calorie dessert, it really hits the spot.
Microwave Tips (Very Important)
- Start with 45 seconds
- Check the center before adding more time
- Add 5–10 seconds at a time if needed
- Overcooking will make it rubbery or dry
Every microwave is different, so think of this as a guideline, not a fixed rule.
How to Make It Even Better
Want to upgrade your mug brownie? Try one of these:
- Add a few chocolate chips
- Top with whipped cream
- Drizzle peanut butter on top
- Add a square of chocolate in the center before microwaving
Why This Recipe Works
This recipe keeps things simple with just a few ingredients and a quick cook time. Instead of being rich and heavy, it gives you a lighter chocolate fix that satisfies the craving without going overboard.
It’s perfect for those moments when everything goes wrong and you just need chocolate… fast.
Frequently Asked Questions
Why is my mug brownie rubbery?
It was likely overcooked. Start with less time and increase gradually in small increments.
Why is my mug brownie too soft?
It may need a few more seconds in the microwave. Add time slowly until the center is set.
Can I make this gluten-free?
Yes, you can use almond flour instead of regular flour.
Can I make this richer?
Yes, add chocolate chips or a small amount of oil for a fudgier texture.
At around 100 calories, this is a great way to enjoy a chocolate treat without overdoing it. If you try it, let me know how it turns out!
Looking for more quick desserts? Check out my mug cake recipes.
OLD VERSION 2016
Skinny Mug Brownies
Ingredients
- 1 tablespoons cocoa powder, unsweeted
- 2 packets truvia (may substitute for other sweeteners)
- 2 tablespoons all purpose flour (may substitute for Almond Flour)
- 3 tablespoons almond milk (may substitute for regular milk or yogurt)
Instructions
- Place all ingredients in a microwave safe mug. Mix with a fork or small whisk
- Microwave on high for 60 seconds
- Enjoy!
Nutrition
New! Try the improved 2026 version below for a fudgier texture and more consistent results.
Improved Skinny Mug Brownie (2026 Version)
Ingredients
- 1 tablespoon cocoa powder
- 1 tablespoon all-purpose flour or almond flour
- 1 tablespoon sugar or sweetener
- 1 tablespoon milk
- 1 teaspoon oil important for texture
- 1/4 teaspoon vanilla extract
- Pinch of salt
- Optional: 1 tablespoon chocolate chips
Instructions
- Add all ingredients into a microwave-safe mug.
- Mix until smooth and no lumps remain.
- Microwave for 40–50 seconds.
- Check the center. If needed, microwave in 5–10 second increments until just set.
- Do not overcook.
Notes
Nutrition
You may also like:
Microwave Nutella Mug Cake
Chocolate Chip Cookies in a Mug
Banana Bread in a Mug
Mine resulted in a sponge-like consistency. Didn’t really like it.
Oh I am so sorry you didn’t like it K, thanks for letting me know.
K – I find that if you make sure the tablespoons of flour aren’t heaped and add 1 extra tablespoon almond milk, or simply cook above recipe for 50 seconds instead of 60, it’s more brownie like.
Another thing is if you’re not too worried about a few extra calories the above recipe with 1 level tablespoon of Nutella mixed in too results in a lovely gooey texture.!
Thanks for sharing this Tiffany – love this recipe, and it comes without the guilt!
Yumm the Nutella part sounds great! Thanks for sharing your tips Christopher!
Just made these tonight! Turns out great! Very yummy!
We added one more packet of Truvia, were skimpy on the tablespoons of flour, and replaced the almond milk with Califia Farms Almond Milk Creamer (Dairy Free) Vanilla flavor (30 cal per oz), we then added a half a tablespoon of chocolate chips and a half a tablespoon of white chocolate chips, topped with whipped cream! Also microwaved for 50 seconds rather than 60 seconds. Delicious!
Oh that sounds delicious Hannah! thanks for your suggestions!
Mine too…it was like the consistency of tofu. Needless to say I threw it out 🙁
Oh so sorry you didn’t like it Anna.
So was mine….
That is so disappointing Eva, it may have been a tad overcooked
Absolutely loveddddd it!! Tasted so soft, I added a piece of dark chocolate in it and wow. I’ve tried many mug brownies and this by far is my favorite.
Thank you Nancy! glad you liked it!
I agree, very spongy
made this tonight. Yum!
I added a tbsp of Nutella and an extra tbsp of milk and it came out perfect. I “cooked” it for 1 minute and it was doughy but since there’s nothing raw in it, doughy is fine by me.
Thank you! 🙂
Yum Melissa! I need to add that tb of Nutella! It sure would taste amazing!
I added an extra tablespoon of milk, and 1/8 teaspoon of baking powder. Yummy!
yum! I am glad you liked it!
Weird texture but that might be my microwave…
But super good, i added banana! More calories but a bit more filling.
Thanks a lot!
you’re very welcome!
It took 2 mintues for mine to get cooked, and I honestly thought it was awful tasting. It tasted super floury. Wish I had better lucky, but thanks for the idea!
Oh I am so sorry it didn’t work out Natalie 🙁
Mmmmm… thank you! I LOVED it. I made it yesterday and thought it was pretty good so today, I tried out some additions to enhance it further:
– 1 extra teaspoon milk (I used unsweetened vanilla almond)
– a few milk chocolate chips (about half a tbsp)
– 1 extra sweetener packet (splenda is what I have on hand)
– a dash of peppermint extract (less than 1/4 tsp)
Came out quite flavorful, and with my calculations, still only 130 calories!
Wow Jodi! Those are some great additions! Thanks for sharing!
This recipe as is was just awful.
Oh I am so sorry it didn’t work for you Kris
Yeah i just literally made this i found it to gritty of a texture um maybe less sugar it had the fudgy texture and i added the skinny girl syrup the chocolate fudge flavor has potential
This was really awful, made as is. :(. I made one for me and one for my husband and the consistency and taste were horrible.
Oh I am so sorry you didn’t like it Brandy. I am working on a lemon version which is more spongier than this one. I will let you know when I perfect it.
I loved this!! I added in a few dark chocolate chips to give it a rich chocolate flavor and topped it with a little whipped cream. It was delicious! I have been searching for something sweet I can eat on my low calorie diet and this was perfect.
Thanks for letting me know Alicia. Chocolate chips sound like an awesome idea! I will add some to mine as well.
Where is the actual recipe though….
you should see it on the bottom Sophia, click refresh
This is the easiest recipe I’ve seen so far! Most recipes need vanilla extract and brown sugar, which are hard to find where I live, but this recipe uses the most common things to make the best brownies! Its also low on calories, making it perfect as a snack that won’t impact my weight. Thanks for sharing this recipe.
You’re very welcome Noor! I’m glad you liked it. Have a wonderful weekend.
Decent taste, disgusting texture.
lol Lilly! Thanks for the feedback. The texture will improve if you microwave for less seconds.
This didn’t work at all! I’m so bummed…we followed the recipe to a T and it didn’t rise up at all.
They’re not supposed to rise much. It may have overcooked or undercooked. What about the taste??
i calculated this.. it’s actually 172 calories. you might want to check your recipes a lot better. it’s tasty, though.
Hi Alexis! thanks for your comment. Do you mind telling me the website that calculated the calories?
I found this too. no flour is that low in calories for this to be less than 100 calories. calculated with the exact brand of ingredients and using my fitness pal to log this comes in at 146cal.
This is not at all tasty. In fact it is horrible.
So sorry you didn’t like it, Valery.
It tasted awful and it was rubbery. I used Estevia for my sweetener. I wonder if that’s where I went wrong. I guess the rubber texture could have been from cooking it for the entire minute. I will try it again using a different sweetener.
It may have been overcooked and yes, the stevia may have changed the flavor
For a healthy recipe it is good and easy with few ingredients. Love it!
Thank you Vicky! Glad you liked it!
I liked it…just had to add a bit more milk and cook a few seconds left..but works for me!
Glad it worked for you Barbara! thanks for the feedback and suggestions
97 calories of sadness and disappointment. Gross texture, bad flavor, and just generally an upsetting thing to eat. Upsetting enough for me to comment about it publicly, a thing I’ve never done for a recipe.
Very poetic K 🙂 . So sorry it didn’t work out for you. The texture may have happened because the cake got overcooked in your microwave
Substituted regular flour for coconut flour and it was amazing. It really gave it some texture. However, when I made it with regular flour, it turned out bland and dry. The texture was unappetizing. The original recipe gave me something to work with and I was able to tweak it a little bit to suit my personal tastes 🙂
Thanks for the comment Amber. Never thought about using coconut flour in this particular recipe
That was HORRIBLE. took a small bite, spit it out and threw it away !
So sorry you didn’t like it Sharon. Thanks for your feedback
I found that the only thing that saved this was the dollop of low carb ice cream I put on it. Very spongy, and tasted like oil, even though there was no oil in it. I won’t be trying this again, sorry
Oh so sorry you didn’t like it Mickie. Thanks for the feedback
I made this tonight with almond flour and it was liquid. I even tried microwaving longer and it stayed liquid. Almond flour was my only substitute so I assume that was the problem :(.
yes, Almond flour and regular flour cannot be substituted 1:1 ratios 🙁 But you can try this recipe made with almond flour –> https://livingsweetmoments.com/fudgy-keto-mug-cake/
Love this!! Thank you so much! I top it with some Halo ice cream and its delicious! Filled my chocolate craving!! Also I make the recipe 1 1/2 times so all the ingredients times 1 1/2, which is under 150 calories! Then I microwaved for 60 seconds and the consistency was PERFECT! Put like 3 tablespoons of halo s’mores ice cream and you’ve got an under 200 calorie snack that actually is extremely filling! Thanks again! Any other low cal chocolate easy recipes and I’m there lol
Yumm Halo Top with brownie sounds amazing! thanks for your comment and feedback Jenna
Hi again I saw a comment where they said it was more calories so I thought I add it up just to see and when I added them all up, its actually less!!! (At least on my end lol)
Here’s my break down:
1 tbsp of Unsweetened cocoa stop and shop brand) = 20 calories
2 packets Truvia or Splenda (I used Splenda)= 0 calories
2 Tbsp of flour=55 calories
3 tbsp of unsweetened vanilla almond milk=6 calories
30 calories per cup, 16 tablespoon in a cup so less than 2 calories per tablespoon)
20+55+6= 81 calories!!!!
Sometimes it depends on the brand of ingredients. That may vary in calories
Hi there, tried this night and it was pretty good. I used sweet n low instead of trivia and regular 1%milk.
Taste was good but a bit doughy and not super sweet. Not sure of calories breakdown either since idk what the flour is.. do you have an ingredient / nutrition breakdown for hour recipe above? What’s the flour calorie count?
Added a small spoonful of vanilla ice cream and was yummy!
I used all-purpose (regular) flour for this recipe Tyler.
I woke up today with a sweet tooth, so I tried this recipe. I did put a little Nutella and only cooked for 50 seconds as suggested, as well as put a marshmallow in the center. The only issue I had was that it was a little spongy and chunky, but it tasted very homemade and delish!
Hi Bailey! nutella and marshmallows sound like the perfect combination to this mug cake. Thanks for sharing!
Hi! I loved the way the pictures looked so I decided to give the recipe a try. I followed the directions exactly and was left with a soupy chocolate mess. I decided to give it another try, however I acquired the same results. Please let me know how I can fix this.
Hi Em. Did you try to cook it for a few more seconds?
Used the Almond flour and Almond milk, 1 minute, nothing. Another 30 seconds, nothing, just a soupy mess! Wish o had read the comments first because I was ambitious and mixed up enough of the dry ingredients to make 4 so I’d have it on hand! Will try tomorrow again, maybe add some regular flour? Use 2% cow’s milk? We’ll see.
Hi! I was thinking of trying this, but what wattage microwave did you use? I have an unusually low wattage microwave, so I usually have to add time, but I don’t want to overcook 😅
Wasn’t sweet at all. Really bitter and not to mention the texture ew
taste like butt. not worth it, splurge the calories a bit more for a mug brownie. really doesn’t fill the hole of a brownie at all gross (sorry to the author of the recipe, this isn’t a diss to you)
thanks for the feedback
This recipe was absolutely terrible. It was the consistency of play dough, and lacked in taste. Immediately threw it out. Followed the recipe exactly
I should have read the reviews first. What a waste of ingredients! It has the most awful texture I can’t even describe it!
made the skinny mug chocolate brownie today, mixed all the ingredients and cooked for 1 minute in my 800 watt microwave , the results were disappointing.
1. didn’t rise, so was just looked like a brown sponge in the bottom of the mug.
2. was just like chewing a rubber sponge, not a nice consistency.
not worth doing again
I loved it! I topped with frozen whipped cream and an unsweetened dark chocolate square. Totally will be making again 🙂
sounds delish!!!
I found these to lack chocolate flavor. I used stevia as the sweetener and my brownie was very bitter. Not sure how to get a chocolate flavor and remove the bitter taste. The consistency was great. Just don’t know how to fix what it lacks.
Hi Lisa, I’m sorry this happened. You can add some chocolate chips for more sweeter flavor or add more stevia