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Keto Mug Brownie Recipe

When you crave a brownie, you crave a brownie. A chocolate mug cake simply won’t do it. Brownies have a different texture and dessert experience overall. This indulgent keto mug brownie for one is sure to satisfy that craving without completely blowing your carb count for the day.

Instead of making a whole sheet of keto brownies, make this brownie mug cake that’s portion controlled for one person. See how you can treat yourself with this low-carb dessert in about five minutes.

Brownie in a mug with chocolate chips by a blue napkin.

Low-carb Mug Brownie for One

Coming in at 7.2 net carbs, this brownie mug cake is a rich dessert for one or even two should you choose to share. I like to save this recipe for heavy workout days or split it with my husband to make it easier to fit into my macros for the day.

Ingredients for low-carb brownie in a mug.

Keto Mug Brownie Ingredients

Here’s what you need to make this mug brownie. The exact measurements are in the recipe card below.

  • Almond flour
  • Cocoa powder
  • Low-carb sweetener
  • Salt
  • Baking powder
  • Low-carb milk substitute
  • Butter
  • Vanilla extract
  • Keto chocolate chips

Brownie in a mug directions

In a microwave-safe mug or dish that’s at least 8 ounces, stir together the almond flour, cocoa powder, granulated erythritol, salt, and baking powder until well combined.

Mixing dry mix for brownie mug cake with a fork.

Add in the milk, melted butter, and vanilla. Stir until smooth.

Brownie batter in a mug next to measuring spoons and chocolate chips.

Gently stir in one tablespoon of the chocolate chips.

Cooked mug brownie by chocolate chips on a table.

Microwave for one minute and thirty seconds or until the top is opaque and cooked through.

Do not overcook! See notes below on why you want it to look undercooked and let it set.

Chocolate glaze for brownie topping.

Top the mug brownie with the remaining tablespoon of chocolate chips or melt them to use as a drizzle. Do a little of both!

Top of a mug brownie with glaze and chocolate chips.

Microwave mug brownie recipe notes and FAQ

Can I make this recipe ahead of time?

This mug brownie is best served warm straight out of the microwave. Of course, let it cool enough to avoid burning your tongue, but it’s the tastiest while it’s still warm.

The beauty of mug desserts is to whip them up quickly when the craving strikes. No need to make any of them ahead of time due to their simple nature.

Brownie in a white dish by mini chocolate chips and a teal napkin and gold fork.

Do not overcook!

It’s extra important for this recipe that you do not overcook it. In fact, you want it to look under cooked. Let it set for about a minute after microwaving and it will set nicely. The end result when cooked correctly is a rich and moist brownie-like texture, not cake, which is the goal.

Gold fork in a mug brownie topped with glaze, chips, and whipped cream.

Can I replace the sweetener?

Yes, you can use your choice of keto sweetener in place of erythritol.

Brownie in a white ramekin by a teal napkin and chocolate chips.

Can I replace the almond flour?

It’s not recommended replacing the almond flour with this mug brownie. This recipe was tested and designed to get a good brownie texture. Altering the flour could result in throwing off the overall flavor and texture of this mug dessert.

Fork with brownie above a brownie in a ramekin.

Be sure to share this with your friends and family living a low-carb life!

Brownie in a mug with chocolate chips by a blue napkin.
Yield: 1 mug brownie

Low-Carb Brownie in a Mug

Prep Time: 3 minutes
Cook Time: 2 minutes
Total Time: 5 minutes

Satisfy your brownie craving with this mug cake for one. Mug brownie with the entire topping is 7.2 net carbs.


  • 6 Tablespoons almond flour
  • 2 Tablespoons cocoa powder
  • 2 Tablespoons granulated erythritol
  • 1/8 teaspoon salt
  • 1/4 tsp baking powder
  • 2 Tablespoons milk of choice
  • 2 Tablespoons melted butter
  • 1/4 teaspoon pure vanilla extract
  • 2 Tablespoons keto friendly chocolate chips


  1. In an 8 ounce mug, stir together the almond flour, cocoa powder, granulated erythritol, salt, and baking powder until well combined. 
  2. Add the milk, butter, and vanilla. Stir until smooth. 
  3. Gently stir in 1 Tablespoon of the chocolate chips. 
  4. Cook in the microwave for one minute and thirty seconds or until the top is opaque and cooked through. 
  5. Top the mug cake with the remaining Tablespoon of chocolate chips or melt to use as a drizzle.


Let cool slightly, but best enjoyed warm.

Do not overcook or it will become tough.

You can replace the erythritol with the keto sugar replacement of your choice.

Nutrition facts calculated using Carb Manager and are not guaranteed to be 100% accurate.

Leave off the topping to shave off some carbs.

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Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 563Total Fat: 52.5gSaturated Fat: 22.8gCholesterol: 61mgCarbohydrates: 53.3gNet Carbohydrates: 7.2gFiber: 22gSugar: 1.4gSugar Alcohols: 24gProtein: 10.4g

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Brownie in a mug with whipped cream and chocolate chips.

Let me know how you like this low-carb brownie in a mug!

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