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Fudgy 90-Second Keto Mocha-Spice Brownie

This single-serving keto mug brownie is the perfect answer to a sudden craving. It's rich, fudgy, and ready in under two minutes. We've balanced this recipe to be perfectly diabetic-friendly, using almond flour and a non-nutritive sweetener to keep net carbs incredibly low. The addition of instant espresso and a hint of cinnamon creates a deep, complex mocha-spice flavor that makes this simple treat feel truly decadent.
Course Dessert
Cuisine American
Keyword keto mug brownie recipe
Prep Time 2 minutes
Cook Time 2 minutes
Total Time 4 minutes
Servings 1
Calories 364kcal

Ingredients

  • 1/4 cup blanched almond flour
  • 2 tbsp granulated allulose or erythritol sweetener
  • 1 tbsp unsweetened cacao powder
  • 1/4 tsp sodium-free baking powder
  • 1/4 tsp instant espresso powder
  • 1/4 tsp ground cinnamon
  • 1/8 tsp salt
  • 1 tbsp avocado oil
  • 1 large egg yolk
  • 1/2 tsp vanilla extract

Instructions

  • Combine Dry Ingredients: In a 10 to 12-ounce (300-350ml) microwave-safe mug, add the almond flour, sweetener, cacao powder, sodium-free baking powder, instant espresso powder, cinnamon, and salt. Use a fork to whisk these ingredients together thoroughly, breaking up any clumps.
  • Add Wet Ingredients: Add the avocado oil, egg yolk, and vanilla extract directly into the mug with the dry ingredients.
  • Mix Batter: Whisk vigorously with the fork until a smooth, thick, and glossy batter forms. Scrape the sides and bottom of the mug to ensure everything is fully incorporated.
  • Microwave: Place the mug in the center of your microwave. Cook on high power for 75-90 seconds. The brownie will puff up and should be just firm to the touch on top. Be careful not to overcook, as it will continue to set as it cools.
  • Serve: Let the brownie cool for 1-2 minutes (it will be extremely hot). Enjoy directly from the mug.

Notes

Nutrition Facts
  • Serving Size: 1 mug brownie (approx. 94g)
  • Calories: 364
  • Total Fat: 34.3g
  • Saturated Fat: 5.1g
  • Sodium: 305mg
  • Total Carbohydrates: 10.4g
  • Dietary Fiber: 6.2g
  • Total Sugars: 1.6g
  • Added Sugars: 0g
  • Protein: 9.8g
  • Net Carbohydrates: 4.2g