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Overhead angled shot of a mug with the Low-Carb Double Chocolate Mug Cake garnished with a scoop of ice cream and drizzled with caramel. The mug has a spoon and rests atop a marble countertop.

Low-Carb Double Chocolate Mug Cake

  • Author: Sara Nelson
  • Prep Time: 4 minutes
  • Cook Time: 1 minute
  • Total Time: 5 minutes
  • Yield: 1 mug cake 1x
  • Category: Dessert
  • Method: Microwave
  • Cuisine: American
  • Diet: Gluten Free


This Low-Carb Double Chocolate Mug Cake is a fluffy and moist cocoa cake with rich and gooey chocolate chunks that is cooked in the microwave in just 60 seconds. This single-serving chocolate mug cake is delicious, can be made quickly, and contains just 8 grams of net carbs per serving.



  1. Whisk together ground sunflower seed meal and cocoa powder until light and fluffy. Ensure there are no clumps. Transfer to microwave-safe mug and whisk in remaining dry ingredients.
  2. Add sour cream, egg yolk, heavy cream, and using a fork, mix until ingredients are well-combined. Add in chocolate bar pieces and mix again.
  3. Let batter settle in mug for 1 minute before transferring mug to microwave to cook for 45 seconds – 1 minute (my microwave is 1000 watts and I cooked my mug cake for 1 minute).
  4. Allow to cool slightly before serving.

Recipe Notes:

Net Carbs: Per serving, this recipe contains 8 grams of net carbs. Net carbs are calculated by taking total carbs, subtracting fiber, and subtracting sugar alcohols. The recipe, as written, yields 1 serving.

Oven Instructions: Follow the mixing instructions of the recipe but, instead of transferring the batter to a coffee mug, transfer it to a cupcake pan or oven-safe ramekin. Place the cake in the oven at 350 degrees for about 10-12 minutes, checking for doneness as you would with a full-size cake using a toothpick. Insert a toothpick into the center of the cake and check for cleanliness; it’s done if it comes out clean.

Refrigerator Storage: Store in an airtight container for up to 1 week. I would suggest also wrapping it tightly in plastic wrap or aluminum foil, so it doesn’t dry out.

Freezer Storage: You can freeze chocolate mug cake for up to 3 months. Be sure to wrap it tightly in plastic wrap or aluminum foil before storing it in an airtight container. Thaw frozen mug cakes overnight in the refrigerator before reheating for 10-30 seconds in the microwave.

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