To make the pancakes, whisk together the flour, baking powder, baking soda, sugar, salt, and cinnamon in a large bowl.
Add the eggs, melted butter, and milk. Whisk until just combined. Do not overmix!
Fold in the grated apple until evenly distributed. Then, let the batter rest for at least 4 minutes.
Meanwhile, heat a non-stick skillet over medium heat and lightly grease it with cooking spray.
Pour portions of batter onto the skillet to make several pancakes, making sure not to overcrowd the pan.
Cook until bubbles form on the surface and the edges look set. Flip and cook the other side until golden brown, about 2 to 3 minutes per side.
Serve the apple pancakes warm with the homemade caramel apple sauce spooned on top. Enjoy!