In a large bowl, whisk together the applesauce, egg, maple syrup, oil, and vanilla extract until smooth and well combined.
Add the flour, baking powder, cinnamon, and salt directly to the bowl. Sprinkle the baking powder, cinnamon, and salt evenly over the flour so that they distribute well throughout the batter.
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 about 5 minutes. The batter should be thick but scoopable. If it seems too thick to spread slightly once added to the pan, stir in 1 tablespoon of water at a time until it reaches the desired consistency.
Scoop about 1 to 2 tablespoons of the batter onto the heated skillet to form 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.