Quick Oat Bran & Cocoa Mug Cake
Desserts

Quick Oat Bran & Cocoa Mug Cake

ML
By Marie Lefebvre · Updated September 26, 2026

A rich and fluffy mug cake ready in just minutes — no oven needed! Made with wholesome oat bran and cocoa, this single-serve treat satisfies chocolate cravings the healthy way. Perfect for a guilt-free dessert any time of day.

Prep⏱️ 7 min
Servings👥 1 servings
Difficulty📊 Very Easy
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🛒 Ingredients

1 servings

1
  • 1 small egg
  • 4 tablespoons milk
  • 2 tablespoons neutral oil
  • 1 level tablespoon unsweetened cocoa powder
  • 2 level tablespoons light sugar
  • 4 level tablespoons oat bran
  • 1 level teaspoon baking powder

Directions

  1. 1

    Crack the egg into a large microwave-safe mug and beat well with a fork until slightly frothy.

  2. 2

    Add the oil, sugar, milk, and cocoa powder, then whisk everything together with a fork until smooth and well combined.

  3. 3

    Stir in the oat bran and mix until no lumps remain and you have a uniform batter.

  4. 4

    Add the baking powder and fold gently into the batter without overmixing.

  5. 5

    Microwave on full power for 3 minutes. The cake should be risen and just set in the center. Let it rest for 1 minute before eating directly from the mug.

💡 Chef's Tip

Microwave wattages vary — check at 2 minutes 30 seconds to avoid overcooking. A few dark chocolate chips stirred in before cooking make it extra indulgent. Enjoy warm for the best soft, moist texture.