01 - Wrap grated raw potatoes in a clean kitchen towel and squeeze firmly to extract excess moisture until potatoes feel relatively dry.
02 - In a large mixing bowl, add grated potatoes, mashed potatoes, sliced scallions, and melted butter. Mix thoroughly to incorporate all ingredients evenly.
03 - Whisk together flour, baking powder, salt, and pepper in a separate bowl until uniformly combined.
04 - Pour dry ingredients into potato mixture. Add milk and stir gently just until a thick batter comes together—avoid overmixing to prevent toughness.
05 - Warm 1 tablespoon vegetable oil in a large nonstick skillet over medium heat until shimmering.
06 - Drop approximately 1/4 cup batter per pancake into heated skillet. Gently flatten with spatula to form even rounds. Fry 3 to 4 minutes on first side until golden brown and crisp.
07 - Flip pancakes carefully and continue frying 3 to 4 minutes on second side until golden throughout. Add additional oil between batches as necessary.
08 - Transfer cooked pancakes to paper towel-lined plate to drain excess oil. Serve immediately while hot, optionally garnished with additional sliced scallions.