01 - Preheat oven to 350°F. Line a 9x5-inch loaf pan with parchment paper or grease thoroughly with butter or cooking spray.
02 - In a large mixing bowl, whisk together almond flour, coconut flour, sweetener, baking powder, baking soda, cinnamon, and salt until well blended.
03 - In a separate bowl, whisk eggs until beaten. Add melted butter, almond milk, vanilla extract, and mashed bananas. Stir until smooth and fully incorporated.
04 - Pour wet ingredients into dry ingredients. Fold together using a spatula until just combined, being careful not to overmix as this can make the bread dense.
05 - Gently fold in chopped nuts or sugar-free chocolate chips if desired, distributing evenly throughout the batter.
06 - Pour batter into prepared loaf pan. Use spatula to spread evenly and smooth the top surface.
07 - Bake for 45 to 55 minutes until golden brown on top and a toothpick inserted in the center comes out clean.
08 - Let bread cool in pan for 10 minutes. Remove from pan and transfer to wire rack to cool completely before slicing for best texture.