Preheat the oven to 180C or Gas 4
Grease a 1kg loaf tin.
Cream dairy-free butter and sugar together until light and fluffy.
Slowly mix in the beaten egg.
Sift the flour, baking powder, salt, and spices together. Add this to the butter, sugar, and egg mixture. The mixture might look dry at this stage.
Add the mashed bananas and give it a good stir to ensure it is evenly mixed.
Optional. Add pecans, raisins, or dairy-free chocolate chips if desired. Ensure they are evenly mixed in.
Spoon into the prepared loaf tin.
Bake in the oven for 50 minutes. Test with a knife or skewer. If it comes away clean it is cooked. If not then cook for a further 10 minutes and check again.
To serve, best sliced with a bread knife.