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A spoon holds a portion of chocolate mug cake above a mug, with chocolate chips and cocoa powder in small bowls nearby.
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Black Bean Chocolate Mug Cake

My black bean chocolate mug cake is rich, fudgy, and ready in under ten minutes, all in a single mug in the microwave. No flour, no oven, no waiting!
Prep Time5 minutes
Cook Time4 minutes
Total Time9 minutes
Course: Desserts
Cuisine: American
Diet: Gluten Free, Halal, Hindu, Kosher, Low Lactose, Low Salt, Vegetarian
Keyword: black bean chocolate cake, black bean recipes, chocolate mug cake, healthy mug cake, mug cake
Servings: 1 serving
Author: Sarah Bond

Ingredients

  • 1 tsp ground flax seed
  • 2 tsp water
  • ⅓ cup black beans drained and rinsed, 57 g
  • 2 Tbsp brown sugar 40 g
  • 1 Tbsp cocoa powder 7 g
  • 1 Tbsp oil or melted butter 12 g
  • 1 Tbsp yogurt or sour cream 18 g
  • 1 Tbsp milk 15 mL
  • ¼ tsp cornstarch optional for more cake-like texture
  • ¼ tsp baking powder
  • 1 pinch of salt
  • 2 Tbsp chocolate chips 25 g

Instructions

  • Flax Egg: In a microwave-safe mug, combine 1 tsp ground flax seed and 2 tsp water. Stir and let sit for 2 to 3 minutes to thicken.
    A white mug filled with a small amount of brown liquid sits on a dark, textured surface.
  • Mash Beans: Add ⅓ cup black beans (drained) directly to the mug and mash with a fork until mostly smooth. Some small bits are fine.
    A white mug containing a dark, mixed batter with a spoon inside, surrounded by small bowls of ingredients on a dark countertop.
  • Mix Batter: Add 2 Tbsp brown sugar, 1 Tbsp cocoa powder, 1 Tbsp oil or melted butter, 1 Tbsp yogurt or sour cream, 1 Tbsp milk, ¼ tsp cornstarch, ¼ tsp baking powder, and 1 pinch of salt. Stir until fully combined and smooth.
    A white mug with a spoon contains cocoa powder, a creamy topping, and a mixture of ingredients, placed on a dark surface.
  • Add Chocolate Chips: Fold in 2 Tbsp chocolate chips.
    A ceramic mug filled with chocolate batter and topped with chocolate chips, with a spoon inside, on a dark surface.
  • Microwave: Microwave on 100% power for about 4 to 4½ minutes, until set in the center (a toothpick inserted should come out mostly clean with a few moist crumbs).
    A mug filled with baked chocolate cake sits on parchment paper, surrounded by chocolate chips, a glass of milk, and a spoon.
  • Serve: Let sit for a few minutes before eating. The cake will continue to set as it cools.
    A spoon holds a portion of chocolate mug cake above a mug, with chocolate chips and cocoa powder in small bowls nearby.

Video

Notes

Mug size does not significantly affect cook time. Both a standard mug and a larger mug produced similar results.
For best texture when eating immediately, cook for about 4½ minutes. If you plan to store it and eat later, cook for closer to 4 minutes, as it will continue to firm up and can become slightly drier over time.
Storage: Cover loosely with plastic wrap or a small plate and store at room temperature for up to a day, or in the fridge for up to two days. The texture firms up further as it cools, which is actually pretty good cold straight from the fridge. If reheating, microwave for 20 to 30 seconds.
All tests were done at 100% microwave power.

Nutrition

Serving: 1serving | Calories: 380kcal | Carbohydrates: 50g | Protein: 8g | Fat: 17g | Saturated Fat: 6g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 6g | Trans Fat: 0g | Cholesterol: 5mg | Sodium: 160mg | Potassium: 300mg | Fiber: 6g | Sugar: 30g | Vitamin A: 20IU | Vitamin C: 0mg | Calcium: 80mg | Iron: 3mg
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