Khao Piak Sen / Lao Chicken Noodle Soup

One of my favorite Lao restaurants in Seattle, Sap Sap in White Center, makes some of the best Khao Piak (and Lao food in general) I’ve ever had. Every spoonful is packed with comfort, depth, and soul. It’s the kind of bowl that warms you from the inside out, and I wanted to capture that same magic at home, while making nearly everything from scratch, from the fried garlic to the delicious broth and even the handmade chewy noodles. While it might seem like there are a lot of moving parts to the recipe, it’s actually surprisingly easy to make at home!

What Is Khao Piak Sen?

Khao Piak Sen is an incredibly cozy and comforting traditional Lao noodle soup. Think of it as the Lao version of chicken noodle soup, but with thick, chewy handmade noodles and a broth that’s rich with aromatics like lemongrass and kaffir lime leaves. If you’re Vietnamese, you might compare it to Bánh Canh, and that’s a great starting point.

Both feature thick, slippery noodles that are made fairly similarly, but the big difference lies in the broth. Given all the aromatics used to make it, Khao Piak Sen tends to be more herbaceous. Both are equally delicious but unique in their own ways.

The Star of the Show: The Noodles

Let’s be real—the noodles are what make Khao Piak Sen so special. They’re thick, chewy, and have this incredible bounce that you can’t get from store-bought noodles. And the best part? You only need two ingredients to make them: rice flour and tapioca starch.

The ratio of those two flours makes a huge difference in the final texture:

• More rice flour = a softer, more tender noodle.
• More tapioca starch = a chewier, almost translucent, and stretchier noodle with more bounce.

After a few rounds of testing and tweaking, I found that a 1:1 ratio of rice flour to tapioca starch gives the perfect balance—tender but still satisfyingly chewy. Play around with the ratio yourself, starting with 1/8th increments, and find out what ratio works best for you!

Here’s how it goes down:

1. Mix the rice flour and tapioca starch with hot water until a dough forms
2. Knead it until smooth, then let it rest
3. Roll it out (thinner than you think, as it will expand when it’s cooking) and cut into strips—no fancy tools needed, just a rolling pin and a knife
4. Dust with starch to keep them from sticking

How to Cook The Noodles:

Once your noodles are ready, the next big decision is how you want your broth to turn out—do you like it thick and velvety, or light and clear?

1. Cook the Noodles Directly in the Broth (for Thick and Goopy Goodness)

This is the traditional way and my personal favorite. When you cook the noodles straight in the soup, the starches from the fresh noodles naturally release into the broth, creating a slightly thickened, almost gravy-like texture. The broth clings to the noodles and coats each spoonful in rich, cozy flavor. If you’re into comforting, stick-to-your-ribs soup, this is the way to go.

2. Boil Noodles Separately (for a Thinner, Clearer Broth)

If you prefer a lighter broth that’s cleaner and delicate, cook the noodles in a separate pot of boiling water. This way, the starch doesn’t cloud or thicken your broth. Once the noodles are cooked, transfer them into your bowl and ladle the broth over the top. You’ll get a brighter, clearer soup that still lets the broth shine on its own.

There’s no wrong choice here—it all depends on how you want your final bowl to feel. Whether you’re in the mood for something rich and cozy, or light and refreshing, you can tweak the cooking method to match your vibe.

Why You’ll Love This Recipe

If you’re looking for a recipe that’s comforting, homemade, and full of flavor, this is it. Here’s why this Khao Piak Sen should be your next weekend cooking project:

You can customize your bowl however you’d like—top it with shredded chicken, boiled eggs, fried garlic, bean sprouts, herbs, lime, or even a bit of chili oil for heat. It’s endlessly versatile and always delicious.

It’s an authentic Lao recipe that captures the essence of home cooking and tradition.

You’ll make nearly every component from scratch, from the noodles to the aromatic broth, which means it’s fresh and full of love. Even so, it’s surprisingly simple to make, even if it looks fancy.

It’s incredibly comforting and hearty, perfect for rainy days, cold nights, or just when you need a little hug in a bowl.