Steps

1. Break about 80g of banana for the batter into bite-sized pieces and place in a heatproof bowl.
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2. Cover with plastic wrap and heat in a 600W microwave for 1 minute, then mash with a masher or fork.
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3. Crack 1 egg into the mashed banana and mix quickly.
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4. Add 2 tbsp of granulated sugar and mix well.
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5. Add 100ml of milk and mix well.
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6. Add 150g of hot cake mix and mix to prevent lumps.
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7. Slice the remaining banana (for topping) into 1cm thick rounds.
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8. Place 10g of unsalted butter in the frying pan and heat.
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9. Add 1 tbsp of granulated sugar and spread it while stirring.
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10. Turn off the heat momentarily, then arrange the sliced banana in the frying pan.
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11. Pour all the prepared batter into the frying pan, cover with a lid, and cook over very low heat for 10 minutes.
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12. Loosen the edges, place a plate over the cake, and invert the frying pan to transfer the cake onto the plate.
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13. Return the cake to the frying pan, and cook uncovered over very low heat for about 5 minutes.
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14. Insert a bamboo skewer into the center. If no raw batter clings to it, the cake is done.
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