In a large bowl, whisk together the applesauce, egg, maple syrup, oil, and vanilla extract until smooth and well combined.
In a separate small bowl, combine the flour, baking powder, cinnamon, and salt until combined.
Add the dry ingredients to the bowl with the wet ingredients and gently stir until just combined. Be careful not to overmix. A few small lumps in the batter are fine.
Let the pancake batter rest for a couple of minutes as you preheat the pan over medium-low heat. The batter should be thick but scoopable. If it seems too thick, stir in 1 tablespoon of water (or milk) at a time until it reaches the desired consistency.
Scoop about 1 to 2 tablespoons of the batter onto the heated skillet to form mini pancakes.
Cook for about 2 to 3 minutes, or until the edges look set and bubbles begin to form on the surface.
Flip the pancakes and cook for another 1 to 2 minutes, or until golden and cooked through. Repeat with the remaining batter, adjusting the heat as needed.