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Double Chocolate Protein Mug Cake (made with oats)
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5 from 16 votes

Double Chocolate Protein Mug Cake (made with oats)

This DOUBLE CHOCOLATE PROTEIN MUG CAKE is the perfect healthy snack for when you are really craving CAKE. It's super easy to make, full of protein, and made with ground oats instead of flour. It taste so good that it's hard to believe it's healthy! And this recipe serves 2, so find someone to share with and they will thank you!
Prep Time10 mins
Cook Time2 mins
Total Time12 mins
Course: Dessert
Keyword: high protein, mug cake
Servings: 2
Calories: 437kcal
Author: Crystal Yentzen


  • 5 tablespoons oat flour*
  • 1/3 cup granulated sugar of choice*
  • 3 tablespoons cocoa powder
  • 2 tablespoons chocolate protein powder*
  • 1/2 teaspoon baking powder
  • 1/4 tsp salt
  • 5 tablespoons milk of choice
  • 3 tablespoons coconut oil, melted or any vegetable oil
  • 1 egg beaten
  • 1/2 teaspoon vanilla extract
  • 2-4 squares dark chocolate


  • In a medium size bowl, whisk together the oat flour, granulated sugar, cocoa powder, chocolate protein powder, baking powder, and salt. Set aside.
  • Stir in the milk, coconut oil, egg, and vanilla extract until smooth.
  • Evenly divide the batter between 2 microwave safe mugs ( I used 8 ounce mugs). Press 1-2 chocolate squares into the center of the batter in each mug.
  • Microwave each cake separately, on high (my microwave is 1200 watt) for 45 seconds. If your microwave wattage is less than 1200, try microwaving for 55-65 seconds. The cake is done when the edges look dry. Please note that there will be wet spots on the cake if you added chocolate to the center. It's better to undercook than overcook the cake as it will dry out.
  • Allow the cakes to cool slightly and top with fresh berries or your favorite toppings.
  • Enjoy!


  1. Oat Flour– Oat flour is sold in stores, but it’s also super easy to make at home. Simply blend old-fashioned oats in a high-speed blender until the oats become a fine powder (about 30 seconds to a minute). Store your oat flour in an air-tight container for up to three months.
  2. Sugar of Choice- You can use regular granulated sugar or granulated erythritol (like I did) for sugar free.  Please note that compared to sugar, granulated erythritol is about 70 percent as sweet, so you may want to add an extra tablespoon or to your preference. Coconut sugar will work as well. 
  3. Chocolate Protein Powder- I used this chocolate protein powder that sweetened with stevia. Feel free to use your favorite brand, although the results will vary slightly. 


Calories: 437kcal | Carbohydrates: 24g | Protein: 16g | Fat: 28g | Saturated Fat: 20g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 3g | Trans Fat: 1g | Cholesterol: 82mg | Sodium: 397mg | Potassium: 244mg | Fiber: 4g | Sugar: 1g | Vitamin A: 119IU | Calcium: 38mg | Iron: 2mg