Preheat your oven to 350°F (175°C) and grease a 9-inch round cake pan with butter.

In a medium bowl, whisk together the flour, baking powder, and salt until well combined.

In a large mixing bowl, beat together the softened butter and brown sugar until fluffy and light in color, then add eggs and milk.

Gradually fold the dry ingredient mixture into the wet ingredients until just combined.

Slice the bananas and arrange them at the bottom of the prepared cake pan, sprinkling brown sugar over them.

Pour the batter over the arranged bananas and smooth it out.

Bake for 40-45 minutes until golden brown and a toothpick comes out clean.

Let the cake cool in the pan for 10 minutes before flipping it onto a plate.