In a bowl, mix the shredded cabbage with a pinch of salt and let it sit for 5 minutes. This helps draw out moisture.
Squeeze the cabbage dry, then combine it with ground chicken, scallion, soy sauce, oyster sauce, garlic, ginger, white pepper, and a pinch of salt. Mix well until everything is cohesive.
Place a small spoonful of filling in the center of a potsticker wrapper. Dip your finger in water and moisten the edge, then fold in half to seal. Pleat the edge to create the traditional potsticker look.
Repeat with the remaining wrappers and filling. Keep the finished dumplings covered with a damp cloth to prevent drying out.
Heat a nonstick skillet over medium-high heat and add the oil. Arrange potstickers flat side down and cook until the bottoms are golden, about 2–3 minutes.
Carefully pour in 2 tablespoons of water and cover the pan. Let the potstickers steam until the wrappers are translucent and the filling is cooked through, about 5–7 minutes. Remove the lid and cook a minute more to re-crisp the bottoms.
Serve hot with a dipping sauce (soy-based or a simple mix of soy, rice vinegar, and a touch of sesame oil).
Tip: If you prefer extra crunch, finish with a quick 30-second blast under the broiler after steaming.