Sift the flour into a bowl, then add the milk, vanilla.e, sugar and eggs. Beat with an electric mixer for up to 1 minute, or until the ingredients are combined with a lighter colour.
Pour in the melted butter, then add the mashed banana and beat for a further minute or until well combined.
Pour into the tin and bake in the oven for 1 hr 10 mine if it's cooked by inserting a skewer. If it comes out clean then its done, if not put back in for another 2 to 5 minutes.