4. Combine the dry ingredients
In another bowl, whisk together the flour, baking soda, baking powder, salt, and cinnamon.
5. Fold the batter
Add the dry ingredients to the wet mixture and gently fold until just combined. Do not overmix. If using nuts, chocolate chips, or coconut, fold them in now.
6. Fill the pan
Pour the batter into the prepared loaf pan and smooth the top. Sprinkle turbinado sugar over the surface for a crunchy topping if desired.
7. Bake
Bake for 55–65 minutes, or until a toothpick inserted in the center comes out with only a few moist crumbs. If the top begins browning too quickly, loosely cover it with foil.
