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Top-down view of a chocolate protein powder mug cake in a white mug with a fork bite of cake in the foreground.
3.52 from 29 votes

3 Ingredient Protein Powder Mug Cake (Low-Carb)

This 3 ingredient protein powder mug cake is a moist, fluffy, buttery chocolate cake that comes together in a matter of minutes. It contains no flour, no sugar, no gluten, and is low carb.
Prep Time3 minutes
Cook Time2 minutes
Servings: 1 person
Calories: 360kcal
Author: Elcy Wang
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INGREDIENTS

  • ¼ cup Vital Proteins Chocolate Collagen Peptides
  • 2 tablespoon butter, melted
  • 1 large egg

INSTRUCTIONS

  • Add the butter to a large microwave-safe mug or small bowl.  Heat in the microwave for approximately 45 seconds on 30% power to soften.  Avoid melting completely as this will cook the egg.
  • Add the egg and whisk to combine the wet ingredients.
  • Add the protein powder and whisk until a smooth batter forms.
  • Microwave for 1 minute and 45 seconds (using a 900-watt microwave), then let it cool for a few minutes before serving. Top with a few chocolate chips, if desired.

NOTES

  • If your microwave has a different wattage, the actual cooking time will vary.  Start with 1 minute, then add additional time as needed.  Your mug cake will rise quite a bit and then deflate when fully cooked.  
  • If your mug cake has a rubbery texture, it may have been overcooked.  Try reducing the microwave time by 15 seconds.

NUTRITION

Calories: 360kcal | Carbohydrates: 7g | Protein: 22g | Fat: 29g | Saturated Fat: 17g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 8g | Trans Fat: 1g | Cholesterol: 278mg | Sodium: 362mg | Potassium: 282mg | Fiber: 4g | Sugar: 1g | Vitamin A: 970IU | Calcium: 217mg | Iron: 1mg