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63 second Keto Mug Brownie

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Keto mug brownie from above with a spoon
A keto friendly mug brownie that cooks in the microwave in 63 seconds that actually tastes like a real brownie! 
 Perfect for a low carber with a sweet tooth
Only 5.3g net carbs!
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This keto friendly mug brownie that cooks in 63 seconds is a chocoholics dream. Unlike the low carb mug brownies you may be used to, this one actually tastes like a brownie! It’s not dry, it’s not dense, it’s not bland, it’s not bitter. Instead it is soft, rich, and full of warm chocolate goodness.
All that in under 5 minutes start to finish.
Think about that for a second, you can go from, “Hmm I want a brownie” to “Oh wow this is a delicious brownie!” in under 5 minutes!

This brownie recipe is a result of literally years of tweaking and experimenting trying to manage chocolate cravings. As a fellow chocoholic I know that struggling with cravings can make sticking to a keto or low carb lifestyle oh so very difficult. 

When chocolate cravings hit, it is far too easy to walk to the corner store and grab a sugar filled chocolate bar to try and satisfy your sweet tooth. But then you hate yourself, plus you had to leave the house…yuck.
What you need is keto friendly chocolate treat that is just as convenient, if not more convenient than that corner store sugar bomb. Preferably something that you can make in the comfort of your own home.
Keto Mug brownie with peanut butter from the top

How to make a Keto Brownie in the Microwave in under 5 minutes

Basic steps:

Step 1. Add ingredients to mug/ramekin.

Step 2. Mix well.

Step 3. Microwave for 63 seconds.

Step 4. Profit. Enjoy your brownie.

Batter up!

This keto brownie recipe is designed with ingredients most low carbers will already have on hand making it easy, quick, and convenient.

The batter consists mainly of almond flour which you can find it at health food stores, low carb grocers, and bulk food stores like Bulk Barn for my fellow hosers. You can also get almond flour online
Almond flour keeps the brownie soft and doesn’t add too much of its own flavour. We want this to tastes like a brownie not almonds.

Cocoa? Cocao? Coco? CooCoo?

A good cocoa powder is the key to getting that deep chocolate flavour you want in a keto brownie. But what is the best low carb cocoa powder? Is cocoa powder even keto friendly? Is it pronounced cocoa or cocao?

Unsweetened cocoa powder. Yes. Depends.

Of course check your labels, but most unsweetened cocoa powders are fine in this quantity. Like anything else, unsweetened cocoa powder is keto friendly, if you are consuming it in reasonable quantities, i.e. don’t eat a pound of it.

1 tablespoon of unsweetened cocoa powder generally has about 1g of net carbs. Very reasonable.
I’m sure that’s welcome news if you are currently struggling with a sweet tooth while trying to stick with keto.
Keto mug brownie with a bite out of it

Sorry, But this is a Sugar Free Zone

This brownie has no added sugar so why does it taste so damn good!?

It took some experimenting to find a keto friendly sugar substitute that I actually liked, and that I was comfortable consuming.  I almost always use a Monk Fruit-Erythritol blend. I think it has the best flavour, consistency, aftertaste, and can be used in quantities very similar to table sugar.

You can try using other keto friendly sweeteners but you may need to experiment with the amount to get the sweetness right. Oh no poor you, you might have to make this brownie more than once!

The Low Carb Grocery

Rise my Glorious Creation!

No one wants a flat, dense brownie…that’s what cookies are for… Ok that didn’t make sense but you were promised a light fluffy, chocolate brownie so how do we make that happen?

For this we need baking powder and an egg. 

The baking powder will create bubbles in the mixture giving you a soft fluffy brownie, and the egg will puff up fast in the microwave and give the brownie some body. Don’t worry, this keto brownie does not taste eggy!

Why 65 Seconds?

This brownie started it’s life as a 60 second keto mug muffin. I took one bite and thought, adding chocolate would make this into a bomb brownie. It was actually the very first keto friendly item I pinned to my Pinterest board.  
Since you brought it up, what a great time for you to pin this for later too, so that when that next chocolate craving strikes, you don’t have to try and remember where you read about this amazing chocolate keto mug brownie.
Save for later

It has come a very long way since then, for starters it is no longer cooks in the microwave for 60 seconds, but 63 seconds. 

Keto Mug brownie on a spoon
In my many years of testing I have found that 63 seconds is the optimal time to cook this specific brownie. However, some microwaves are different. Your optimal cook time might be slightly different. 

But to be honest, unless you completely under cook it, or way way over cook this. You will be just fine somewhere between 60 and 70 seconds

Keto Brownie Pro Tips

This is very hard to mess up. I have stumbled into my apartment after night out and whipped this together in under 5 minutes. It is always delicious….I think. 

Honestly, there are times when I don’t even measure, I just eyeball it with a spoon. It turns out just fine. 
But if you want to take your keto brownie from just fine to “Hot damn are you sure that is low carb?!” then here are some tips for you.
  • Use a dish at least 3 1/2″ [9 cm] in diameter by 2 1/2 [6.5 cm]” deep or it will make a mess!
Ramekin being measured with a measuring tape
  • Add a pinch of salt

You may think a pinch of salt in dessert recipes doesn’t actually do anything, but trust me, it makes that chocolate flavour just smack you right in the face. And who doesn’t want to be smacked in the face with chocolate goodness?

  • Mix well
Make sure you mix this really well and that the consistency of your batter is correct before it goes in the microwave, too liquidy? Add flour, too dry? Add melted butter or sour cream. Don’t add water, you need something with fat. 
Keto mug brownie batter in a bowl
  • Check the brownie for doneness and cook more if needed
Not all microwaves are created equal, and honestly sometimes I feel like my microwave is just like “Nah I don’t wanna cook that fully today”. If you remove the mug brownie and you see there are some liquidy, or uncooked portions. Cook at additional 10 second intervals until cooked through. 
  • Allow brownie to cool before adding frosting or my personal favourite, peanut butter!
Even though this low carb brownie is only cooking in the microwave for a minute or so, the dish gets freakin hot! Seriously it could burn your fingers so be careful, and let it cool before adding frosting or it will just become a goopy mess

How Many Carbs are in a Keto Mug Brownie?


Calories: 430

Fat: 40 g

Net Carbs: 5.3 g

Protein: 13 g


Sodium: 600 mg

Potassium: 350 mg

Magnesium: 100 mg

Calcium: 200 mg

Approximate macro-nutrient values, nutrition may vary depending on ingredients

Eat Smarter, Live Better

Make Ahead Tips

What? You don’t need any, this keto mug brownie is start to finish in less than 5 minutes. 

Keto Mug Brownie with peanut butter

Time to Dive in

I really hope that you enjoy my recipe for a quick microwave keto mug brownie, and may it fulfill that nagging chocolate craving you have been struggling with. 
Access to these types of quick yet satisfying low carb recipes is crucial part of sticking your low carb lifestyle when things get tough. 

If you can whip up a delicious chocolate keto treat quicker than you can go buy a chocolate bar from the store then you are in pretty good shape (literally!).
The best way to make sure these recipes are always at your finger tips is to join the gang and get yummy stuff delivered right to your inbox!

Next time you are craving chocolate. Forget all the sugary crap, and take care of your sweet tooth with a keto friendly 63 second mug brownie instead.

65 Second Keto microwave Mug Brownie

Keto mug brownie
Prep Time 2 minutes
Cook Time 1 minute
Servings 1 Brownie
Calories 430 kcal
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I recipe for a keto friendly brownie that can cooks in the microwave in 65 seconds and is ready in less than 5 minutes from start to finish

IMPORTANT – There are often Frequently Asked Questions within the blog post that you may find helpful. Simply scroll back up to read them!



  • Microwave safe Mug/Bowl/Ramekin (at least 3.5" (9 cm) Dia. and 2.5" (6.5 cm) deep)
  • Spoon
  • Measuring spoons


  • 2 tablespoons (30g) butter melted
  • 3 tablespoons (20g) almond flour
  • 2 tablespoons (10g) unsweetened cocoa powder
  • tablespoons (20g) Monk fruit-Erythritol Sweetener
  • ¼ teaspoon (1g) vanilla extract
  • ½ teaspoon (2.5g) baking powder
  • 1 large egg
  • 1 pinch salt


In a microwave safe mug/bowl/ramekin

  • Melt butter in microwave for 20-30 seconds
  • Add remaining ingredients and using a spoon or whisk to mix well into a smooth batter
  • Microwave for 65 seconds. Careful the dish gets hot!
  • Enjoy with low carb whipped cream, frosting, peanut butter, or just on its own!


  • See the post above for some tips and making this recipe
  • Make sure you have a properly sized dish or it will make a big mess!
  • You can try other sweeteners or other low carb flours, but you may need to experiment to get it right. 
If you have a sweet tooth you gotta try this keto mug brownie! Click To Tweet


Calories: 430kcal

Nutritional information is calculated using the recipe calculator and verified database available from Cronometer. Although every reasonable effort is made to provide accurate information this estimate is provided as courteously and convenience only. To obtain the most accurate representation of the nutritional information in any given recipe, you should calculate the nutritional information with the actual ingredients used in your recipe.

Try the free recipe calculator at Cronometer
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Keywords: dessert, keto, low carb, microwave
Keto mug brownie being eaten

Enjoy your keto chocolate treat!

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