Vietnamese Chili Oil Recipe: Spicy Aromatic Drizzle for Every Dish

This chili oil brings bold Vietnamese flavors to your kitchen with minimal effort. The secret lies in toasting the aromatics just until fragrant before steeping them in hot oil.

I developed this method after years of testing different ratios of chili to oil, settling on a balance that delivers heat without overpowering the dish. The result is a versatile condiment that enhances noodles, dumplings, or even a simple bowl of rice.

What makes this version special is the combination of dried chilies and spices that infuse the oil with complex, layered flavors. The slow steeping process ensures every drop carries depth.

Store in an airtight container and use within a month for maximum freshness. This small batch makes enough to experiment with different dishes.

Ingredients for Vietnamese Chili Oil

Bold spices and hot oil create a versatile condiment with layered depth.

The chili peppers are the soul here. Asian markets carry the best dried varieties—look for bright red, plump peppers (not dusty old ones). I grab mine from H Mart or any well-stocked international aisle. Sichuan peppercorns add that signature tingle, but if you can’t find them, black peppercorns work in a pinch (just know the flavor profile changes). Star anise and cinnamon should be whole, not ground—they steep better without turning bitter.

No dried chilies? Crushed red pepper flakes at half the amount work, but the texture won’t be the same. Subbing ground spices? Use one-third the quantity and strain the oil well. For the oil, avocado or grapeseed are my go-tos—they handle high heat without smoking. The shallots crisp up beautifully, but a small onion sliced thin does the job too (just pat it dry first).

This keeps for 1 month at room temperature in a cool, dark place. The flavors deepen over time, so resist the urge to use it all at once. If you see sediment, just give it a stir—it’s packed with flavor (don’t toss it).

Step-by-Step Instructions for Vietnamese Chili Oil

Here’s the method. Simple, aromatic, and packed with heat and depth.

Step 1: Toast the Spices for Maximum Flavor

In a dry skillet over medium heat, add the dried red chili peppers, Sichuan peppercorns, star anise pods, and cinnamon stick. Toast for 2-3 minutes, stirring constantly, until the spices become fragrant and the chili peppers darken slightly.

Watch carefully—this step wakes up the essential oils in the spices, which will infuse into the oil. If the Sichuan peppercorns start to smoke, reduce the heat immediately. Remove from heat and set aside to cool slightly.

Step 2: Prepare the Aromatics and Oil

Thinly slice the shallot into rings, peel and smash the garlic cloves, and thinly slice the fresh ginger. These aromatics will add layers of flavor to your oil. Keep them separate for now—you’ll add them at different stages.

Pour the 2 cups neutral oil into a small saucepan. Choose an oil with a high smoke point, like vegetable or peanut oil, to handle the heat without breaking down. Heat over medium-low heat until it reaches 300°F—this is the ideal temperature for infusing without burning.

Step 3: Infuse the Oil with Spices and Aromatics

Carefully add the toasted spices to the warm oil. The oil should gently bubble around the spices—this is how you know the infusion is working. After 2 minutes, add the shallot and ginger. Stir gently and cook for another 3-4 minutes until the shallots turn light golden brown.

Now add the garlic cloves and cook for 1-2 minutes until they just begin to turn lightly golden. Garlic burns easily, so keep an eye on it. The oil should now be deep red from the chili peppers and fragrant with all the spices and aromatics.

Step 4: Season and Cool the Chili Oil

Remove the saucepan from heat and stir in the 0.5 tsp salt and 1 tsp sugar. The salt enhances all the flavors, while the sugar balances the heat from the chili peppers. Taste and adjust seasoning if needed—remember, the flavors will intensify as it cools.

Let the oil cool to room temperature, then strain it through a fine-mesh sieve into a clean jar. Press gently on the solids to extract as much oil as possible, but don’t force it—you want to leave the sediment behind for a smooth, clear oil.

Store in an airtight container at room temperature. The flavors will continue to develop over the next few days, becoming even more aromatic and complex.

Pro Cooking Tips for This Dish

Oil Temperature Control

Maintain the oil at 300°F for perfect infusion—use a candy thermometer for precision. I swear by my Taylor Classic. If it smokes, you’ve gone too far and risk bitterness. 🌡️

Spice Toasting Timing

Toast the Sichuan peppercorns and star anise for just 2-3 minutes. Any longer and the peppercorns can turn acrid. Remove them from heat the moment they smell potent—your nose knows best.

Aromatics Staging

Add aromatics in stages: shallots and ginger first, then garlic last. Garlic burns in 30 seconds if added too early. Keep a close watch—golden garlic adds sweetness, but blackened garlic ruins the batch.

Straining Technique

Use a fine-mesh sieve for straining, and don’t press too hard on the solids. A gentle press extracts oil without muddying your creation. I line my sieve with cheesecloth for extra clarity.

Flavor Development

Let the oil rest for 24 hours before first use. The spices continue to infuse, deepening the flavor. Store in a dark glass jar away from light to preserve its vibrancy. 💡

Safety Note

Hot oil can splatter. Use a deep saucepan and stand back when adding spices. I keep a silicone splatter screen handy for added protection.

Frequently Asked Questions