Chinese five spice powder is a spice mixture of star anise, cloves, cinnamon, pepper, and fennel seeds. It lends a classic Chinese flavor to these egg rolls. To make your own, mix 5-6 whole star anise pods, 2 teaspoons Sichuan peppercorns (can sub black pepper), ½ teaspoon ground cloves, 1 tablespoon ground cinnamon, and 1 tablespoon ground fennel seeds, and grind until it forms a uniform powder. Store any leftover five spice powder in an airtight container for future use.