Preheat the oven to 350°F (175°C). Line a loaf pan with parchment paper or lightly grease it. A 5-inch loaf pan works well if you prefer a taller loaf.
Add the cottage cheese to a food processor or blender and blend until smooth.
In a large bowl, combine the mashed bananas, blended cottage cheese, eggs, maple syrup, oil, and vanilla extract.
In a small bowl, mix the dry ingredients: flour, cinnamon, baking powder, baking soda, and salt.
Add the dry ingredients to the wet ingredients and gently fold until just combined. Avoid overmixing to maintain a fluffy texture.
If using protein powder or add-ins like chocolate chips or blueberries, fold them in last.
Pour the banana bread batter into the prepared loaf pan and smooth the top.
Bake for 45–55 minutes for the whole wheat version, or 40–50 minutes for the almond flour version, until a toothpick inserted into the center comes out mostly clean.
Allow the banana bread to cool before slicing.