Preheat your oven to 350°F (175°C) and grease your loaf pan lightly to prevent sticking.
In a large mixing bowl, combine the mashed banana, Truvia, granulated sugar, vegetable oil, egg whites, vanilla extract, and Greek yogurt. Whisk until smooth and well combined.
In another bowl, whisk together the all-purpose flour, nonfat milk powder, collagen peptides, cinnamon, nutmeg, salt, baking powder, baking soda, and additional salt. Ensure there are no lumps.
Gradually add the dry mixture into the wet ingredients, stirring gently until just combined. Avoid overmixing to keep your banana bread light and fluffy.
Pour the batter into your prepared loaf pan and smooth the top with a spatula. If desired, sprinkle some extra cinnamon on top for added flavor.
Place the loaf pan in your preheated oven and bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Once baked, remove the banana bread from the oven and let it cool in the pan for about 10 minutes. Then, transfer it to a wire rack to cool completely. Slice and enjoy your delicious Macro Friendly Banana Bread!