Preheat a skillet over low heat. This ensures your pancakes cook evenly without burning.
In a blender, combine the bananas, eggs, and oats. Blend on low until smooth. The batter should be thick but pourable.
Lightly grease your skillet with cooking spray, oil, or butter. Pour about 1/6 of the batter onto the skillet for each pancake to keep them small and easy to flip.
Cook the pancakes on one side until you see bubbles forming on the surface and the edges begin to set (about 2-3 minutes).
If using mix-ins like nuts or berries, sprinkle them onto the uncooked side of the pancake now and press gently into the batter.
Flip the pancakes carefully and cook for another 2-3 minutes, until golden brown on the bottom.
Repeat with the remaining batter, greasing the skillet as needed between batches.
Serve warm with your favorite toppings such as maple syrup, nut butter, or fresh fruit.