Preheat the oven to 180C/350F/Gas3 Grease and line a 2lb loaf tin
Melt the butter, sugar and vanilla over a low heat. Once it has all melted together remove from the heat and pour into a big mixing bowl along with the mashed up banana.
Crack in a cup and beat before adding to the banana mixture.
I like to add a little beaten egg, then some of the flour, then some milk, then egg again etc, until I have used all the ingredients up. Toss in the walnuts and stir in.
Spoon the batter into the prepared tin and bake for 35 minutes or until risen and golden and a little skewar comes out clean.
Let it cool on a wire rack and serve with a good cup of tea.
