In a large mixing bowl, whisk together the protein powder, almond flour, baking powder, cinnamon, and salt until no lumps remain.
In a separate bowl, beat together the eggs, almond milk, vanilla extract, and melted coconut oil until smooth.
Pour the wet ingredients into the dry ingredients and gently stir until just combined, being careful not to overmix—a few lumps are perfectly fine.
Let the batter rest for 5 minutes to allow the protein powder to fully hydrate and the batter to thicken slightly.
Heat a non-stick griddle or large skillet over medium-low heat and lightly grease with coconut oil.
Pour 1/4 cup of batter for each pancake onto the griddle, cooking for 2-3 minutes until bubbles form on the surface and edges look set.
Carefully flip the pancakes and cook for another 2-3 minutes until golden brown and cooked through.
Serve immediately with your favorite sugar-free toppings like fresh berries, nut butter, or a dollop of Greek yogurt.