In a large bowl, combine pork, cabbage, mushrooms, garlic, green onions, hoisin, ginger, sesame oil, Sriracha and white pepper.
To assemble the dumplings, place wrappers on a work surface. Spoon 1 tablespoon of the pork mixture into the center of each wrapper. Using your finger, rub the edges of the wrappers with water. Fold the dough over the filling to create a half-moon shape, pinching the edges to seal.
Heat vegetable oil in a large skillet over medium heat. Add potstickers in a single layer and cook until golden and crisp, about 2-3 minutes per side.
Serve immediately with soy sauce, if desired.
Notes
*Sriracha is an Asian-style hot chili sauce and can be found in the Asian section of your local grocery store.To freeze, place uncooked potstickers in a single layer on a baking sheet overnight. Transfer to freezer bags.