Banana Mug Cake in 3 Minutes
Desserts

Banana Mug Cake in 3 Minutes

ML
By Marie Lefebvre · Updated October 3, 2026

A fluffy, fragrant banana mug cake cooked in just 3 minutes in the microwave, topped with a silky homemade caramelized banana sauce. The ultimate quick-fix dessert with barely any washing up!

Prep⏱️ 10 min
Servings👥 1 servings
Difficulty📊 Very Easy
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🛒 Ingredients

1 servings

1
  • 1 egg
  • 1 ripe banana (for the batter)
  • 3 tablespoons sugar
  • 4 tablespoons all-purpose flour
  • 1 tablespoon neutral oil
  • 1 teaspoon baking powder
  • 4 tablespoons milk
  • 1 ripe banana (for the sauce)
  • 2 tablespoons sugar (for the sauce)

Directions

  1. 1

    Mash one ripe banana with a fork until you get a smooth, even purée.

  2. 2

    In a mug of about 300 ml, combine the egg, sugar, flour, oil, milk and baking powder.

  3. 3

    Add the banana purée and stir vigorously until the batter is smooth and lump-free.

  4. 4

    Microwave on full power for 3 minutes.

  5. 5

    Meanwhile, mash the second banana and heat it in a small saucepan with the sugar, stirring constantly until you get a golden, creamy sauce.

  6. 6

    Immediately drizzle the warm sauce over the freshly cooked cake and serve directly in the mug — do not remove the cake!

💡 Chef's Tip

Use very ripe bananas with black spots — they are sweeter and blend effortlessly. Keeping the cake in the mug preserves its moisture and soft texture. For an indulgent twist, add a spoonful of chocolate hazelnut spread on top of the sauce.