Preheat a non-stick griddle or skillet on medium heat.
Mix the dry ingredients together in a large bowl by whisking the flour, protein powder, baking powder, and salt until well combined.
In a separate medium-sized bowl, mix the wet ingredients together by whisking the soy milk, applesauce, maple syrup, and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir until just combined (do not overmix). Allow the batter to rest for a few minutes (it will thicken upon standing). Adjust the consistency by adding a bit of soy milk a tablespoon at a time until it is pourable but not runny.
Cook the pancakes by pouring ⅓ cup batter (for each pancake) onto a preheated griddle. The pancakes are ready to be flipped once the edges look set and bubbles have formed on the surface. Using a spatula, carefully flip each pancake and cook for an additional 1-2 minutes until the bottoms are golden brown. Remove from the griddle and place onto a plate or wire rack. Continue making pancakes with the remaining batter.