In a large bowl sift flour and baking powder, add sugar and stir. Add 3/4 of the optional walnuts here.
In a bowl or jug mix maple syrup and eggs.
Mash the banana on a plate then add to the egg mix.
Melt butter.
Add banana and milk mix to flour and stir a couple of times.
Add melted butter to the mix then fold into the flour until all is just combined. Do NOT over mix.
Pour batter into a lined loaf tin approx 24 x 14cm. Sprinkle remaining walnuts on top.
Bake for approx 45-50 minutes testing with a skewer.
Mostly cool in tin, turn out onto a wire rack to completely cool. Keeps in the fridge for approx 3 days.
Notes
Slice and freeze.Add spices to the flour mix.Ice if you wish or dust with icing sugar.Add a handful of sultanas.Slice, carefully heat in the toaster or under griller then butter.Can be made into muffins adjusting cooking times.