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One-Bowl Chocolate Peanut Butter Mug Cake

This rich, keto-friendly mug cake is the perfect answer to a chocolate craving. By using a "one-bowl" method, it comes together in minutes with minimal cleanup. The addition of instant espresso powder deepens the chocolate notes, making it a truly decadent (but fully diabetic-friendly) treat.
Course Dessert
Cuisine American
Keyword Diabetic Chocolate Mug Cake
Prep Time 5 minutes
Cook Time 15 minutes
Total Time 20 minutes
Servings 5 mug cakes
Calories 346kcal

Ingredients

  • 1 cup 112g Almond flour, finely ground
  • 6 tbsp 72g Granular non-nutritive sweetener (e.g., erythritol/monk fruit blend)
  • 1/4 cup 20g Unsweetened cocoa powder
  • 1 1/2 tsp 6g Baking powder
  • 1 tsp 2g Instant espresso powder (optional, but recommended)
  • 1/8 tsp <1g Salt
  • 3 large 150g Eggs
  • 6 tbsp 85g Butter, melted (or coconut oil for dairy-free)
  • 1 1/2 tbsp 24g Unsweetened, no-sugar-added peanut butter
  • 3/4 tsp 4ml Vanilla extract
  • 1 1/2 tbsp 13g Sugar-free chocolate chips

Instructions

  • Preheat & Prep: Preheat the oven to 350°F (180°C). Lightly grease five 6-ounce (170ml) ramekins or oven-safe mugs.
  • Mix Wet Ingredients: In a single medium mixing bowl, add the eggs, melted butter, peanut butter, and vanilla extract. Whisk together until smooth and well-combined.
  • Add Dry Ingredients: Add the almond flour, sweetener, cocoa powder, baking powder, instant espresso powder, and salt directly into the same bowl with the wet ingredients.
  • Combine: Using a spatula or whisk, mix until the batter is thick and just combined. Do not overmix.
  • Portion: Divide the batter evenly among the 5 prepared ramekins.
  • Top & Bake: Sprinkle the sugar-free chocolate chips evenly over the top of each cake. Bake for 15-18 minutes, or until a toothpick inserted into the center comes out clean.
  • Cool & Serve: Allow the mug cakes to cool for a few minutes, as they will firm up. Serve warm, optionally with a dollop of keto-friendly whipped cream or yogurt.
  • Alternative Microwave Method:Divide the batter into 5 microwave-safe mugs. Microwave each mug individually on HIGH for 60-90 seconds, or until the cake is just set in the center.

Notes

Nutrition Facts

Per serving (1 mug cake)
Calories: 346 Total Carbohydrates: 10.9g     Dietary Fiber: 4.8g     Total Sugars: <1g     Added Sugars: 0g Net Carbs: 6.1g Protein: 10.8g Total Fat: 32.5g     Saturated Fat: 12.2g Cholesterol: 164mg Sodium: 277mg