METHOD:Preheat the oven to 340°F (this cake, like most cakes made with purees take way longer to bake and need to bake at a lower temperature, if you bake it at 350 F it will brown too much and get very dry and crusty on the outside and wet inside).Generously butter a 9x5-inch loaf pan + 1 mini loaf. Or you can make this in a Bundt pan or large savarin (which looks like a large donut).Whisk (or sift) together the flours, baking powder, baking soda, spices, and salt in a medium bowl. In a large bowl, whisk together the sweeteners, oils, banana purée, and eggs. Add the dry ingredients to the bowl with the wet ingredients and whisk until just combined. (Adding the dry ingredients to the wet ingredients helps to prevent little dry pockets in the bottom of the bowl.) Fold in the chopped chocolate or nuts if desired.Pour the batter into the prepared pans and bake for 70 to 90 minutes for the larger pan (15 -20 mins for the smaller please note time depends on your pan + oven) or until a skewer inserted in the center of the cake comes out clean. Let the cake cool in its pan on a wire rack for 20 minutes. Run an icing spatula or a thin knife carefully around the edges, and invert the cake from the pan. Re-invert the cake so that it is right-side-up and let cool on the rack for another 20 minutes. Transfer to a serving plate.Notes: you can sprinkle the bread before baking with a mixture of: pumpkin seeds, sunflower seeds, cacao nibs, chopped pecans, walnuts and almonds