Heat your oven to 400°F and generously grease a 12-muffin pan with butter or cooking spray, making sure to coat the bottom and sides of each cup evenly. This prevents sticking and ensures your muffins release cleanly after baking.
Add the cottage cheese, ripe bananas, eggs, honey, and vanilla extract to a blender. Blend for about 45 seconds until the mixture is completely smooth and creamy—this creates a silky base that will give your muffins their tender, moist texture. I find that using ripe bananas with visible brown spots gives the best flavor since they're sweeter and blend more smoothly.
Add the baking powder, cinnamon, nutmeg, and oats directly to the blender with the wet mixture from Step 2. Blend again for about 10-15 seconds until just combined—you want the oats slightly broken down but still with some texture. Pour the batter into a bowl and let it sit for 5 minutes; this allows the oats to absorb some moisture, which creates a better crumb structure when baked.
Divide the rested batter among the prepared muffin cups, filling each about 3/4 full. This leaves room for the muffins to rise without overflowing. Place the pan in your preheated 400°F oven and bake for 22-25 minutes, until the tops are golden brown and a toothpick inserted into the center comes out clean or with just a few moist crumbs.
Remove the pan from the oven and let the muffins cool in the pan for 10 minutes—this allows them to set and become sturdy enough to remove without falling apart. I like to run a thin knife around the edges before turning them out onto a wire rack to cool completely. This ensures they release cleanly and continue cooling evenly.