Place the butter in a bowl, add the sugar and vanilla, beat using the whisk on a hand mixer until the mixture becomes lighter in colour. Stir in the bananas, eggs and milk.
Mix the flour with all the other ingredients up to and including the salt, mix into the banana mixture. Transfer the dough to the prepared tin, arrange the bananas on top.
Approx. 55 mins. in the centre of an oven preheated to 160°C. Remove from the oven, allow to cool slightly, remove the banana bread from the tin and leave to cool on a rack.