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Glass dish of Biscoff mug cake topped with melted Biscoff spread and a Lotus cookie, with a spoonful of cake lifted up to show the texture.
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Biscoff Protein Mug Cake

When that sweet tooth hits but you don’t feel like turning on the oven, this Biscoff protein mug cake is the answer. It’s soft, warm, and full of that caramelized cookie butter flavor we all love, but with a boost of protein to keep you satisfied. I’ve been testing mug cakes for years, and trust me, this one actually works. No dry, rubbery texture here. Just a fluffy single-serve cake you can whip up in minutes with pantry staples.
Course Breakfast, Dessert
Cuisine American
Keyword biscoff cake, biscoff mug cake, biscoff protein recipe, protein mug cake
Prep Time 5 minutes
Cook Time 2 minutes
Total Time 7 minutes
Servings 1 serving
Calories 348kcal
Author Brandi Crawford

Ingredients

  • ¼ cup + 2 teaspoons all-purpose flour
  • ¼ cup Greek yogurt I used vanilla; your favorite flavor
  • ½ teaspoon baking powder
  • 2 tablespoons biscoff butter
  • 2 tablespoons water
  • Biscoff cookies Optional for topping! You can even break a cookie down into bits and sprinkle it over the mug cake for more cookie flavor.
  • sugar or sweetener Optional. If you know you like sweet cakes, go ahead and add 1-2 teaspoons to suit your taste.

Protein Powder Version (Use all of the ingredients listed above and adjust the water serving)

  • 1 scoop protein powder 31 grams; Unflavored or vanilla works great.
  • 4 tablespoons water

Instructions

  • In a microwave-safe mug, add the flour and baking powder. Stir to combine so the leavening is evenly distributed.
  • Stir in the Greek yogurt, Biscoff butter, and water. Mix until the batter is smooth and no streaks of flour remain. The texture should be thick but pourable, add a splash more water if needed.
  • Cook the mug cake in the microwave for 60–90 seconds, depending on your microwave’s strength. The cake should rise, look set on top, and feel firm in the center. My microwave cooks very slow. It takes me 2 minutes. This timing will vary for everyone.
  • If the middle is still gooey, return to the microwave in 10–15 second bursts until fully cooked through.
  • Enjoy warm straight from the mug. For extra indulgence, top with a drizzle of Biscoff butter or a sprinkle of crushed Biscoff cookies.

Notes

If you add protein powder to this recipe it adjust the nutrition as follows:
Cals: 469
Fat: 14G
Net Carbs: 50G
Protein: 35G

Nutrition

Serving: 1serving | Calories: 348kcal | Carbohydrates: 47g | Protein: 11g | Fat: 13g