In a large mixing bowl, combine 1 cup of oat flour, 1 tablespoon of baking powder, 1 teaspoon of salt, and ½ cup of protein powder. Whisk until well blended.

In a separate bowl, whisk together ½ cup of milk, 1 large egg, and 1 tablespoon of maple syrup until smooth.

Pour the wet ingredients into the bowl with the dry ingredients. Stir gently until just combined.

Place a skillet over medium heat and lightly grease it. Let it warm for about 2-3 minutes.

Using a ladle, pour portions of the batter onto the skillet and cook for about 2-3 minutes until bubbles form.

If using fillings, place them on top of a pancake, cover with another pancake, and press gently to seal.

Serve immediately while warm. Store leftovers in an airtight container for up to 3 days.