Place oats into the container of a high-power blender and blend on high speed until they reach a flour-like consistency (approximately 20-30 seconds). Transfer the blended oats to a small bowl.
Combine baking powder and cinnamon with the oat flour mixture and set aside.
In your blender, combine milk, banana, grated zucchini, and vanilla, blending until smooth.
Add the dry ingredients from the small bowl into the blender and blend on medium speed until well combined.
Add the egg and blend until just mixed.
Preheat a frying pan over medium heat or a large griddle until it reaches 350 degrees F.
Once the pan is hot and the batter is prepared, lightly grease it with oil or non-stick cooking spray.
Scoop 2 heaping tablespoons of batter per pancake onto greased pan or griddle. Cook for 3-4 minutes, or until bubbles form on the surface and the edges firm up.
Carefully flip and cook for an additional 1-2 minutes until golden brown. Serve with toppings such as applesauce, berries, nut butter, banana slices, or maple syrup. Enjoy!