Blend the batter: Add banana, egg, oats, milk, cinnamon, vanilla, baking powder, and salt to a blender.
Blend until smooth and slightly thick. If mixing by hand, mash the banana very well, whisk in the egg and milk, then stir in finely ground oats (pulse them in a food processor first for a smoother texture).
Rest briefly: Let the batter sit for 2–3 minutes. This allows the oats to absorb liquid and thicken for easier flipping.
Preheat the pan: Heat a nonstick skillet over medium-low heat.
Lightly grease with butter or oil. Keep the heat on the lower side to prevent over-browning.
Portion small pancakes: Spoon 1–2 tablespoons of batter per pancake to make toddler-sized rounds. Smaller pancakes cook evenly and are easier for tiny hands to hold.
Cook gently: Cook for 2–3 minutes, until the edges look set and small bubbles appear.
Slide a thin spatula underneath and flip carefully. Cook another 1–2 minutes, until golden and cooked through.
Check doneness: The center should be springy to the touch, not wet. If the outside browns too fast, lower the heat.
Serve warm: Let cool slightly before serving.
Cut into strips or small squares for younger toddlers. Add a thin spread of yogurt or nut/seed butter if you like.