This Sous Vide Chili Oil is easy to make, incredibly aromatic, and flavorful. It is made by infusing Chinese peppers and spices in a water bath for 8-16 hours. The low temperature of sous vide cooking helps preserve many of the aromatic compounds found in the chile peppers and spices.
Crush the chili peppers, Sichuan peppercorns, fennel, and coriander seeds until coarsely ground in a mortar and pestle. You can also use a Ziplock bag and a rolling pin. Transfer the spices to a sous vide bag along with the star anise, cinnamon, and 1 cup of oil.
Submerge the bag of chilis in the water bath and cook for 8 hours and up to 16 hours. Since water is denser than oil, the bag will float. You can place a heat-resistant object on top of the bag to submerge it in the water.
Strain the oil through a fine-mesh sieve into a storage container. You can use it immediately or refrigerate it for up to two weeks.