Roast the Peanuts: Heat 1 teaspoon of neutral oil in a wok over medium heat. Add the raw peanuts and stir constantly for 4–5 minutes to prevent burning. Turn off the heat and continue stirring for another minute using the wok’s residual heat. Transfer the peanuts aside to cool completely; they will become crunchy as they cool.If using roasted, shelled, unsalted peanuts, skip this step. Prepare the Shrimp: Butterfly each shrimp by making a shallow cut along its back without slicing all the way through.Place the shrimp in a bowl and add 1 teaspoon neutral oil, Shaoxing wine, salt, and white pepper powder. Mix to coat, then leave to marinate for 15 minutes. Mix the Sauce: In a medium bowl, combine the water, rice wine vinegar, light soy sauce, sugar, 1 teaspoon cornstarch, Sichuan peppercorn powder, and dark soy sauce. Stir until combined, then set aside.
Coat the Shrimp with Cornstarch: Immediately before cooking, add ½ teaspoon cornstarch to the marinated shrimp and mix thoroughly so the shrimp are evenly coated.
Sear the Shrimp: Heat the wok over high heat until it just begins to smoke. Add 2 tablespoons of neutral oil, followed by the shrimp. Quickly sear the shrimp on both sides until they turn light pink, then transfer them to a bowl. Avoid cooking them for longer than necessary at this stage, as they will return to the wok later. Cook the Aromatics: Reduce the heat to low and add the remaining 1 tablespoon of neutral oil. Add the sliced garlic, minced ginger, chopped dried chilies, and scallion whites. Stir-fry for 1–2 minutes, keeping the heat low, until the aromatics become fragrant. Return the Shrimp to the Wok: Increase the heat to high and return the seared shrimp to the wok. Stir-fry for 30 seconds to combine them with the aromatics. Add the Sauce: Stir the prepared sauce again immediately before using, as the cornstarch settles at the bottom of the bowl. Pour the sauce into the wok and stir-fry for another minute, allowing it to thicken quickly and coat the shrimp. Finish with Peanuts: Add the roasted peanuts and mix everything together until the shrimp, aromatics, sauce, and peanuts are evenly distributed. Turn off the heat.
Serve Immediately: Transfer the Kung Pao Shrimp to a serving dish and serve hot while the shrimp are tender and the peanuts retain their crunch.