1-First Step: Preheat your water bath Set your sous vide machine to 160 degrees Fahrenheit and fill a large pot or container with water. This temperature is crucial as it gently extracts flavors from the spices without burning them, taking about 10-15 minutes to reach. Once ready, you’ll have a stable environment for infusing the oil effectively.

2-Second Step: Prepare the spices Coarsely crush the 1 cup Chinese dried red chiles, 1 tablespoon Sichuan peppercorns, 1 tablespoon fennel seeds, and 2 teaspoons coriander seeds. You can use a mortar and pestle for this, or place them in a Ziplock bag65 and use a rolling pin to break them down. This step releases the essential oils and boosts flavor extraction during cooking, which typically takes 5-10 minutes.

3-Third Step: Assemble the ingredients in the bag Add the crushed spices, 10 star anise pods, 2 cinnamon sticks, and 1 cup neutral-flavored oil into a sous vide bag. If using optional additions like ½ teaspoon cloves and 3 bay leaves, include them now. Seal the bag carefully, removing as much air as possible to prevent floating and ensure even cooking, which helps in locking in those aromatic compounds.

4-Fourth Step: Submerge and cook Lower the sealed bag into the preheated water bath, using a heat-resistant object like a spoon or clip to keep it submerged, as oil tends to float. Cook for a minimum of 8 hours and up to 16 hours based on your desired intensity this long, low-heat process is what makes the flavors so deep and prevents any burning. For example, 8 hours works for a milder version, while 16 hours creates a more robust oil.

5-Fifth Step: Strain the oil After cooking, remove the bag from the water bath and let it cool slightly for safety. Strain the oil through a fine-mesh sieve into a clean container to separate the solids from the liquid. This step ensures a smooth, grit-free oil that’s ready for use, and it only takes a few minutes.

6-Final Step: Store and enjoy Once strained, the oil is good to use right away or store in the refrigerator for up to two weeks. Drizzle it over dishes like noodles or stir-fries to add a spicy kick this recipe’s precision makes every batch consistent and flavorful. For more sous vide tips, check out our sous vide basics guide on the blog.