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Keto Mug Brownie

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5 from 17 votes
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This Keto Mug Brownie recipe is an incredibly decadent dessert. Make a single serving brownie whenever you are craving chocolate or something special. With only 7 ingredients you can have a fabulous dessert in under 5 minutes that is only 5 net carbs. These low carb brownies are sugar-free, grain-free, and gluten-free too. 

bite of keto mug brownie with whipped cream on a fork resting on a plate with keto mug brownie

If you are a person who is addicted to chocolate, you may be worried when you first start eating low carb. Don’t worry! There are plenty of fantastic recipes that you can enjoy that will easily fit into a low carb diet that is decadent and chocolatey. You don’t have to feel like you are giving everything up; you are simply choosing to eat healthier and say goodbye to refined sugars. 

Sometimes I get in the mood for something rich and chocolatey, but I don’t want to go overboard and have too much. That is why a low carb keto mug brownie is ideal for me. It’s a fantastic sized portion, and I don’t even have to share it with anyone. Plus, it’s easy enough to make that if someone else wants one, they can have their own.

It took several tries to get the perfect brownie texture but this was worth it! It is my new go-to easy dessert.

spoonful of keto mug brownie in a mug

Ingredients

Just seven ingredients and a minute or two are all you need to be well on your way to enjoying an amazing brownie in a mug!

Almond Flour – I prefer using just almond flour in this keto mug brownie recipe. Coconut flour will not give you that fudgy texture you want in a brownie.

Unsweetened Cocoa Powder – Regular grocery store cocoa powder is fine. For an Oreo flavor try using black cocoa powder.

Sweetener – I use my combination of xylitol, erythritol, and stevia in this recipe. You can find my sweetener recipe HERE.

Butter – In my house, I only buy salted butter. If you sub in unsalted butter make sure to add a tiny pinch of salt. An oil such as coconut oil or light olive oil can also work.

Egg Yolk – You only need a little bit of egg to make the brownie set properly. Adding a whole egg will make it too eggy. Just use the yolk and save the white for another use.

Vanilla Extract – Adding a bit of vanilla boosts the flavor of the keto mug brownie.

Sugar-Free Chocolate Chips – Semi sweet chocolate chips, dark chocolate chips, milk chocolate chips, or even white chocolate or peanut butter chips are delicious in this mug recipe.

small bowls of ingredients

How to Make a Keto Mug Brownie

It’s amazing how quickly and easily you can throw together a keto brownie mug cake. With just 7 ingredients, you can have yourself an incredible dessert to complete any meal. 

First Step: Mix together the butter and sweetener in a microwave-safe mug. Microwave 30 seconds. Add the rest of the wet ingredients and the dry ingredients at the same time. Mix well.

white mug filled with batter

Second Step: Once everything is combined well, put it in the microwave for 1 minute. 

That’s all there is to it; now you can dig in and enjoy your keto brownie in a mug!

overhead view of keto brownie in a mug

Variations and Ideas

There are several things you can do to these low carb mug brownies to make them a little different and tailored to everyone’s cravings. We like to change our brownies based on whoever is eating them. Kids LOVE to make their own brownies, so we will let them. Here are a few ideas. 

Nuts – Walnuts, pecans, almonds, or hazelnuts are all terrific nuts for these brownies. Just add ½ – 1 tablespoon of your favorite nut. 

Cinnamon – Add a sprinkle of cinnamon or pumpkin spice for a fall flavor. 

Peppermint Extract – Add a dash for a chocolate mint brownie!

Cayenne Pepper – If you haven’t had a brownie with a touch of cayenne pepper yet, you’ve been missing out. The cayenne makes the chocolate even more rich and indulgent. Just don’t add a lot of they will be overwhelming. A tiny sprinkle will do. 

Ice Cream – Serve the mug brownie with a little bit of keto ice cream. Keto chocolate ice cream and Keto coffee ice cream are some of our favorites. Vanilla ice cream is always a classic choice.

Whipped Cream – Top with a dollop of whipped cream.

Melted Chocolate Chips – Drizzle some melted sugar-free chocolate chips on top of the keto mug brownie right before eating. So good and gives you even more to satisfy your chocolate craving. 

Oven-Baked Brownie – If you don’t have a microwave and want to bake a single-serve brownie just bake it at 350 until it looks barely set about 20 minutes. Make sure to grease the ramekin or mug well.

Dairy-Free – To make this dairy-free just sub in coconut oil for the butter.

Sweetener – Try using a brown sugar sweetener for a warmer molasses like flavor.

bite of keto mug brownie on a fork resting on a plate with keto mug brownie and whipped cream

Common Questions

Do I Have To Share My Brownie?

Well, it’s entirely up to you, but one of the advantages of these brownies in a mug is that they are already individual servings. You can easily share if you only want a taste or two, but you can easily eat the entire thing guilt-free. I’d suggest making a few chocolate brownie microwave mug cakes so everyone gets their own. Everyone who tries one says they are glad I made them their own!

Can I Make This Nut Free?

Yes! This keto mug brownie recipe works very well with sunflower seed flour instead of almond flour. That is my go-to sub when baking and in particular in brownie recipes when I need them to be nut-free.

Do I Have To Put Egg Into the Mug Brownie?

My recipe for this keto mug brownie only calls for the yolk. The egg yolk adds to the richness of the brownie, gives it a texture similar to regular brownies, and cooks up perfectly. However, if you want to skip the egg yolk if needed. An alternative is 1 tablespoon of sour cream, but keep in mind the texture will be slightly different. You are welcome to try out various egg substitutes until you find what works for you. 

spoonful of keto mug brownie with whipped cream in a mug

 

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spoonful of keto mug brownie recipe with whipped cream in a mug

Keto Mug Brownie

Taryn Scarfone
This Keto Mug Brownie is an incredibly decadent dessert. Make a single serving size brownie whenever you are craving chocolate or something special.
5 from 17 votes
Prep Time 1 minute
Cook Time 2 minutes
Total Time 3 minutes
Course Dessert, Snack
Cuisine American
Servings 1
Calories 391

Ingredients
 
 

Instructions
 

  • Microwave the butter and sweetener for 30 seconds.
  • Add the other ingredients and mix well.
  • Microwave 1 minute.

Notes

Nutrition: This makes 1 serving. The entire mug brownie has 5 NET carbs.
Microwave Cooking Times: The power of microwaves can vary. These times are based on an 1100 watt microwave. Decrease or increase as needed for your microwave.
To Store: keep leftover mug brownie in the refrigerator for up to 2 days. Make sure they are stored in an airtight container.
To Reheat: you can reheat the mug brownie in the microwave for 10-20 seconds. 
To Freeze: take the mug brownie out of the mug and store in the freezer for up to 2 months. Reheat in the microwave when ready to serve. 
Notes on Sweeteners: 
I use my own blend of xylitol, erythritol, and stevia in my recipes. This is twice as sweet as sugar. It is comparable to Trim Healthy Mama Gentle Sweet and Truvia.
To sub in Swerve or Lakanto Monk Fruit use 1.5 times the amount of sweetener called for. 
 
To sub in Pyure or Trim Healthy Mama Super Sweet use half the amount of sweetener called for.
 
Substitutions will work in most recipes. They may not work in candies, such as caramel.

Nutrition

Calories: 391Carbohydrates: 10gProtein: 8gFat: 40gSaturated Fat: 22gCholesterol: 256mgSodium: 216mgPotassium: 205mgFiber: 5gSugar: 1gVitamin A: 969IUCalcium: 53mgIron: 4mg
Love this recipe?Please leave a 5 star rating!

More Low Carb Mug Cake Options

Keto Vanilla Mug Cake – Great base for a strawberry shortcake.

Black Bottom Mug Cake – This one might be my favorite keto mug cake recipe!

Mini Snickerdoodle Layer Cake – Serves 4 in a mini cinnamon-flavored layer cake.

Keto Lemon Mug Cake – Coconut flour based lemon cake. Light & fluffy!

 

Originally Published June 1, 2020. Revised and Republished April 18, 2023.

 

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15 Comments

  1. I attempted to sub in coconut oil, but it turned out runny (still tasting ok just not the right texture!). Can you tell me if microwaving the butter and sweetener should yield softened butter or melted completely? That’ll help me get it perfect next time. Thanks! Perfect for my chocolate craving when I also don’t have the energy to bake a full pan of keto brownies…5 stars

    1. Did you try to make it into regular baked brownies? Or did you divide between 3 mugs? The 2x and 3x conversions are automatic. If you changed the baking method I’m not sure they would work.

  2. I love mug cakes because I don’t have to worry about portion control! Haha this recipe is perfect for my frequent chocolate cravings!5 stars

  3. I had one of these last night after dinner and OMG was it delicious! Thanks so much for sharing the recipe!5 stars

  4. When I started keto I didn’t think I’d ever have sweets again. This recipe is perfect for when I just need a bite!5 stars

5 from 17 votes (7 ratings without comment)

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