The Secret Finishing Touch for So Many Vietnamese Dishes.

If you’ve ever had a dish topped with a glossy spoonful of chopped scallions glistening in oil and thought, what is that magic?—this is it. Vietnamese scallion oil (mỡ hành) might just be the easiest condiment you’ll ever make, but don’t let its simplicity fool you. It adds a rich, savory pop to grilled meats, rice dishes, noodles, and even fried snacks. It’s the kind of finishing touch that makes a dish feel complete.

This version comes together in just minutes with three basic ingredients: scallions, oil, and a pinch of salt. That’s it! No fancy tools, no tricky steps—just bold, fragrant flavor that makes everything it touches a little bit better.

What Is Vietnamese Scallion Oil?

Mỡ hành is a Vietnamese condiment made by pouring hot oil over chopped green onions. It’s warm, aromatic, and incredibly versatile. Think of it as a quick-infused oil that delivers both flavor and a little shine—perfect for spooning over grilled meats, noodles, and anything that needs a boost of flavor and color.

You’ll often see it drizzled on dishes like lemongrass chicken, rice plates, grilled pork vermicelli bowls, banh mi sandwiches, and savory cakes like bot chien, banh beo, and banh khot. It’s one of those “small but mighty” additions that takes a dish from good to so good.

Ingredients You’ll Need

Please scroll ⬇️ to the recipe card for the full ingredient amounts and instructions.

Scallions (Green Onions) – Use fresh, firm stalks. Wash and dry thoroughly before chopping to avoid splatter when the hot oil hits.
Neutral Oil – Vegetable, canola, avocado, or peanut oil work great. Just make sure it’s neutral so it doesn’t overpower the scallion flavor.
Salt (Optional) – A tiny pinch helps round out the flavor, especially if you’re not adding it to a dish that’s already well-seasoned.

labelled ingredients for scallion oil: green onions and oil.

How to Make Scallion Oil

cutting board with knife thinly slicing scallions.

Step 1: Prep the scallions. Wash and pat dry thoroughly with a paper towel. Finely chop the green onions and place them in a heatproof bowl (glass or ceramic works best).

Step 2: Heat the oil. In a small saucepan, heat oil over medium heat until hot but not smoking—about 300°F if you’re using a thermometer.

Step 3: Pour and sizzle. Carefully pour the hot oil over the chopped scallions. They should sizzle instantly!

Step 4: Let it rest. Allow the oil to sit for a few minutes. This helps the scallions soften and the flavors meld.

That’s it. You now have a small batch of liquid gold.

Tips for the Best Mỡ Hành

✔️ Dry your scallions well – Water and hot oil don’t mix. To prevent splattering, make sure the scallions are completely dry before pouring the oil.
✔️ Use a heatproof bowl – The bowl should be able to handle hot oil. Stick with ceramic or glass—never plastic.
✔️ Make it fresh – Scallion oil tastes best when made fresh or stored only for a few days. If the scallions start to brown or lose color, it’s time for a new batch.
✔️ Don’t overheat the oil – If the oil smokes, it’s too hot. You want a sizzle, not a deep fry.

bowl of scallion oil surrounded by green onions.

How to Store

Store the scallion oil in an airtight container in the refrigerator for up to one week. To use, simply reheat it gently or let it come to room temperature before serving!

Final Thoughts

Mỡ hành is one of those things that once you start making, you’ll wonder how you ever cooked without it. It’s fast, flavorful, and makes everything better—from noodles and rice to grilled meats and street food snacks. Let me know in the comments how you use it, or pin this post to save it for later!

RECIPE