1 Place the peppercorns in a small bowl. 2 Heat the oil in a wok over high heat until it reaches the smoking point. Different oils have different smoke points. The oil is ready when you see a swirl of white smoke coming from it. 3 Add the oil to the peppercorns and stir immediately with wood chopsticks to help the peppercorns to release their aroma and flavor. Let it cool for at least 2 hours to develop the flavor. 4 Drain the oil into a glass container using a fine mesh strainer. Discard the peppercorns.