Blend the base: Add oats, protein powder, baking powder, eggs, milk, and banana to a blender. Blend until smooth and slightly thick, about 20–30 seconds. Let it rest for 2 minutes to thicken.
Check the consistency: The batter should be pourable but not runny.
If too thick, add 1–2 tablespoons milk. If too thin, blend in a tablespoon of oats or more protein powder.
Preheat the pan: Heat a nonstick skillet over medium heat. Lightly grease with butter or oil.
Cook the pancakes: Pour 1/4 cup batter per pancake.
Cook 2–3 minutes, until bubbles form and edges look set. Flip and cook 1–2 minutes more until golden and cooked through.
Repeat: Grease the pan as needed and finish the batter. Keep cooked pancakes warm on a low oven setting if making a large batch.
Serve: Top with fresh berries, a drizzle of maple syrup, Greek yogurt, or nut butter.