Add the tofu, Chinese chives, mushrooms, carrot, scallions, garlic, and ginger to a large bowl. Add the Sichuan pepper, neutral oil, light soy sauce, dark soy sauce, sesame oil, salt, and sugar. Mix thoroughly until evenly combined and well seasoned.
Lightly grease four heatproof ramekins. Press one wonton wrapper into the base of each ramekin, letting the edges fold up the sides.
Spoon a thin, even layer of filling over the wrapper. Place a second wonton wrapper on top, then add another layer of filling. Repeat once more so each ramekin has three layers of filling, each separated by a wrapper.
Spoon ¼–⅓ cup of the hot broth evenly over the filling in each ramekin, letting it settle between the layers.
Place two wonton wrappers over the top of each ramekin to seal, gently pressing the edges down.
Loosely cover the ramekins with baking paper or foil. Place in a steamer over boiling water and steam for 15–18 minutes, until the wrappers are fully tender and the filling is hot through.
Rest for 1–2 minutes before serving. Spoon some of the broth from the base over the layers just before eating.