Craving Dessert? Try This Low-Carb Chocolate Mug Cake Recipe

Ah, the mug cake. It’s perfectly portioned and has a built-in handle — what more could you ask for? With just a few minutes of prep and cooking time, you can dig your fork into a light and fluffy single-serving dessert without having to break out the stand mixer or even turn on the oven.
One catch: Traditional mug cake recipes are typically loaded with butter, refined sugar, and flour. (You know that crave-worthy confetti mug cake at Starbucks? It has 29 grams of sugar.) So you might assume this dessert is off-limits if you’re trying to cut out added sugar or reduce your intake of refined carbs.
But it is possible to make a low-carb chocolate mug cake — and it tastes just as decadent.
Keep in mind there’s no true definition of “low-carb.” But at just 10 grams of carbohydrates — compared to 55 grams of carbs for that aforementioned confetti-cake version — this recipe is significantly lower in carbs than the typical mug cake. And because it doesn’t have added sugar, it’s also Sugar Free 3-approved!
Bake delicious mug cakes like this or blend up a rich, chocolate smoothie with Openfit Plant-Based Nutrition Shake. Get it here!
Ingredients for Low-Carb Chocolate Mug Cake
Like our Vanilla Mug Cake and Double Chocolate Protein Mug Cake, this keto-friendly protein powder mug cake is made from a short and simple list of wholesome ingredients. You’ll need:
- ¼ cup unsweetened soy milk
- 1 tsp. avocado oil
- 1 large egg
- ½ tsp. pure vanilla extract
- 1 scoop Openfit Plant-Based Protein Shake
- ½ tsp. baking powder
- Nonstick cooking spray
This low-carb mug cake recipe calls for avocado oil, a heart-healthy fat that helps the cake stay moist. And it gets its rich, chocolatey flavor from Openfit Plant-Based Nutrition Shake, which is sweetened with stevia and monk fruit extract.
Each serving of this sweet treat delivers 28 grams of protein and 7 grams of filling fiber — but has just 280 calories and 1 gram of sugar. Just be sure to choose unsweetened soy milk to keep the sugar count down.
Ready to have your mug cake and eat it too? Try our quick and easy recipe below.

Low-Carb Chocolate Mug Cake
Whip up this delicious low-carb mug cake in just 7 minutes! You can have it as a healthy dessert or as a sweet protein snack.
Ingredients
- ¼ cup unsweetened soy milk
- 1 tsp. avocado oil
- 1 large egg
- ½ tsp. pure vanilla extract
- 1 scoop Openfit Plant-Based Nutrition Shake
- ½ tsp. baking powder
- Nonstick cooking spray
Instructions
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Add soy milk, oil, egg, and extract to a medium bowl; whisk to combine.
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Add Openfit Plant-Based Nutrition Shake and baking powder; mix well.
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Lightly coat medium mug with spray; pour soy milk mixture into mug.
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Microwave on high for 2 minutes, or until fluffy. Serve immediately.
Recipe Notes
Tip: If you don’t have a microwave, you can bake in a preheated oven at 350° F for 20 minutes.
The Nutrition Facts box below provides estimated nutritional information for this recipe.
Photography by Anguel Dimov, AB Creative