1. Pre-heat oven to 200 degrees Celcius.
2. Mash the peeled bananas with a fork. Mix well with oil and sugar.
3. Add the flour, baking powder and cinnamon, and combine well.
4. Add any additional ingredients.
5. Baked in a greased and lined 2lb loaf tin for 20 minutes, before checking. Cover with foil, if the loaf cake is browning. Bake for another 40 minutes (approximately).