Kue Pisang (Resep Terbaik!)

Bahan-bahan (6 porsi)

• 200 g (7 oz) overripe bananas
• 120 g (4 oz) self-raising flour (cake flour or all-purpose flour (see Notes))
• 3/4 - 1 teaspoon baking powder
• 3 large eggs (room temperature)
• 100 g (3½ oz) powdered sugar
• 1 stick unsalted butter (melted (I used Challenge brand butter))