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Chocolate Fudge Brownie Mug Cake

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It’s natural to get a sweet tooth now and then, even on a keto diet. And when you do, what better way to satisfy a sudden sugar craving than with a 5-minute brownie mug cake?

Mug cakes have gotten so popular that you can now find them in the cake mix section of most grocery stores. But this chocolate mug cake is so simple, you probably already have the ingredients in your cupboard.

Plus, you won’t find many pre-packaged keto mug cake options — especially at just 3 net carbs per serving.

Add this filling, gluten-free dessert to your keto meal plan, or make it in minutes anytime you have a sugar craving.

This satisfying chocolate brownie mug cake is:

  • Rich
  • Chocolatey
  • Satisfying
  • 3 grams net carbs
  • Fluffy
  • Perfectly sweet

The main ingredients in this brownie mug cake include:

Optional additions:

Health Benefits of Keto Brownie Mug Cake

#1. Good For Heart Health And Cholesterol

You’ve seen mug recipes all over your Pinterest or Instagram feeds: they’re quick, fluffy, and look so satisfying. But most microwave brownies contain a ton of sugar and processed flour — ingredients that are known for raising your blood sugar and insulin levels and contributing to low-level inflammation.

And inflammation can lead to conditions like high cholesterol and heart disease.

Keep your mug cakes keto and sugar-free with ingredients like almond flour, pastured eggs, and grass-fed butter instead.

Almonds are famous for their heart-healthy properties and may even help lower your LDL cholesterol levels[*]. One study found that eating about 42 grams of almonds per day can lower your LDL cholesterol and help you lose unwanted fat[*].

Pastured eggs are rich in omega-3 fatty acids, which can lower blood triglycerides and improve your heart health[*].

Grass-fed butter is rich in CLA (conjugated linoleic acid) and vitamin K2, both of which are correlated with lower levels of heart disease[*][*].

#2. Boosts Your Energy And Keeps You Full

You may know that chocolate tends to boost your mood, but what about your energy levels?

This low-carb chocolate mug cake is just 3 net carbs and loaded with nutrients and healthy fats. That means, it’s unlikely you’ll experience a sugar high and subsequent crash.

Ingredients like almond flour and acacia flour are high in dietary fiber, which helps keep you full while keeping your digestion on track.

And healthy fats from coconut oil, butter, and MCTs (medium chain triglycerides) provide easy energy and keep you feeling full for hours.

#3. Aids In Digestion

Yes, dessert can be good for your gut.

Highly processed all-purpose flour and sugar can cause inflammation and exacerbate gut conditions like leaky gut.

Instead, this keto brownie mug cake includes healthy fats, protein, and chocolate collagen powder — all of which support blood sugar balance and a healthy gut lining. You can also check out our Keto Brownie Mix.

Collagen, in particular, contains amino acids known to help heal and strengthen your gut lining[*]. And a healthy gut lining means that you’re actually breaking down and using nutrients from your food.

Perfect Keto’s Collagen Powder also contains acacia fiber, which can help with constipation, IBS symptoms, promote weight loss, and diversify your gut bugs[*][*][*]

A chocolate fix is also good for your gut bugs and a 2005 study confirmed that flavonoids in cocoa beans may help alleviate diarrhea[*][*].

There’s nothing better than instant gratification when it comes to dessert — especially fudgy brownie desserts.

Enjoy this single-serving brownie mug cake in 5 minutes or less, top with your favorite keto ice cream or whipped cream and enjoy!


Chocolate Fudge Brownie Mug Cake

brownie mug cake

This single-serving brownie mug cake is keto-friendly and ready in just 1 minute. With simple keto ingredients like chocolate, pastured eggs, grass-fed butter, and collagen powder, this decadent mug cake isn’t just good — it’s good for you.

  • Author: Corina Nielsen
  • Total Time: 5 minutes
  • Yield: 1 large or 2 small brownies 1x



  1. Grease one large mug or two small ramekins with nonstick spray or butter. Set aside.
  2. Add all ingredients to a small bowl and mix with a small whisk until smooth.
  3. Pour into your prepared dish and microwave on high for one minute (for two servings) or 75 seconds for one mug brownie recipe serving.


  • Serving Size: 1 small brownie
  • Calories: 140
  • Fat: 8g
  • Carbohydrates: 6g (3g net)
  • Fiber: 3g
  • Protein: 11g

Keywords: brownie mug cake


7 thoughts on “Chocolate Fudge Brownie Mug Cake

  1. This is by far the best keto rated brownie/mug cake I’ve tried! It’s so incredibly tender and isn’t at all bitter! I added some super creamy whipped cream to the top! Yummo!!!

  2. Love it! I’ve made it several times. Perfect chocolate flavor from Perfect Keto! I added nuts & sugar-free chocolate chips. Yum!

  3. Sounds yummy! But can I ask, how is it 3 net carbs if nutrition states 3 grams carbs and 3 grams fiber? Thanks!

    1. I don’t think so, Mitzi. According to some studies, microwaving foods generally does not destroy nutrients in food.

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