Make oat flour if needed. Blend rolled oats in a blender until fine and powdery. Measure out 1 cup.
Mix dry ingredients. In a bowl, whisk oat flour, protein powder, ground flaxseed, baking powder, baking soda, and salt.
Add wet ingredients. Stir in plant milk, vanilla, maple syrup, and oil. Start with 1 cup milk and add a splash more if the batter is too thick.
You’re aiming for a scoopable, slow-pouring batter.
Rest the batter. Let it sit for 5 minutes. This helps the flax thicken and the oats hydrate, leading to fluffier pancakes.
Preheat the pan. Heat a nonstick skillet or griddle over medium heat. Lightly grease with oil.
Cook the pancakes. Pour 1/4 cup batter per pancake. Cook until bubbles form on top and edges look set, 2–3 minutes.
Flip and cook another 1–2 minutes, until golden and cooked through.
Adjust as needed. If pancakes are spreading too much, add a tablespoon of protein powder or oat flour. If too thick, add a splash of milk.
Serve warm. Top with maple syrup, berries, nut butter, or a dollop of coconut yogurt.