Vegetarian & Vegan Pho: The Complete Guide to Pho Chay

Is Pho Vegan or Vegetarian?

In its classic form, pho is neither vegan nor vegetarian. The dish most people picture — pho bo (beef pho) or pho ga (chicken pho) — is defined by a bone broth simmered for 12 hours or more, and it is usually seasoned with fish sauce. Even the sliced meat aside, the broth itself is an animal product from the first pot of bones.

This is the single most important thing for plant-based diners to understand: you cannot make a bowl of standard pho vegan simply by leaving out the beef. The soul of the dish is the broth, and a meat-based broth stays meat-based whether or not there are slices of protein floating in it.

The good news is that Vietnam has a genuine plant-based pho with centuries of tradition behind it: pho chay. It is not a compromise or an afterthought — it is a complete dish with its own broth, seasonings, and toppings. The rest of this guide explains what pho chay is, how to spot the hidden animal ingredients that trip up vegans, and how to order confidently. For the wider picture of the dish, our ultimate guide to pho covers its history and styles.

What Is Pho Chay and the Buddhist Tradition Behind It?

Pho chay is the vegetarian and vegan version of pho. The word "chay" means "vegetarian" or "fasting" food in Vietnamese, and it points directly to the dish's origins in Vietnamese Buddhist cooking. In the Mahayana Buddhist tradition that shapes much of Vietnamese religious life, many practitioners eat an entirely plant-based diet on certain lunar days — and some monks and devout followers eat chay all year round.

Out of that tradition grew a sophisticated cuisine devoted to recreating beloved dishes without any animal products. Temple kitchens became famous for their skill at coaxing deep, savoury flavour from vegetables, mushrooms, soy, and spices. Pho chay is part of that lineage: a version of the national dish that any observant Buddhist — or any vegan — can eat with confidence.

Because chay cooking is a serious, respected discipline in Vietnam rather than a niche trend, well-made pho chay tastes like pho, not like pho with something missing. The aromatics and spice profile are the same; only the base changes. To understand how much the broth defines the whole dish, see what pho soup is actually made of.

Is Regular Pho Vegetarian If I Order It Without Meat?

No — and this is where plant-based diners are most often caught out. At the majority of Vietnamese restaurants, the standard broth is simmered from beef or chicken bones, so ordering "pho with no meat" still gives you a bowl of animal-based soup. Some kitchens will happily leave out the sliced beef, but they cannot change the broth that has been cooking since the morning.

Fish sauce is the second trap. Even a "vegetable pho" may be finished with nuoc mam, the fermented anchovy sauce that seasons so much Vietnamese cooking. A bowl can look entirely plant-based and still contain fish. That is why the reliable move is to order pho chay by name — a dish the kitchen has built to be meat-free from the ground up — rather than asking for modifications to a meat recipe.

One more nuance: "vegetarian" and "vegan" are not identical. A vegetarian bowl might include egg noodles or a dairy-adjacent garnish; a vegan bowl excludes all animal products. If you are strictly vegan, name it. For more on the sneaky animal ingredients worth watching, our guide to Vietnamese food allergies and dining is a useful companion.

What Goes Into a Vegan Pho Broth?

A great pho chay broth proves you don't need bones to make a soulful pho. It starts with the same signature move as classic pho: charring onion and ginger over an open flame until they blacken and sweeten, then adding them to the pot to give the broth its deep, smoky-savoury backbone. From there the spice sachet is identical — star anise, cinnamon, cloves, coriander seed, and cardamom steeped until fragrant.

What replaces the meaty richness of bone broth is a careful layering of vegetables:

• Mushrooms — shiitake, king oyster, or straw mushrooms add glutamate-rich umami that mimics the savoury depth of meat.
• Daikon radish — simmered whole, it lends a clean, gentle sweetness and body to the broth.
• Apple or Asian pear — a traditional trick that adds natural sweetness without refined sugar.
• Carrot, corn, and onion — everyday vegetables that build a rounded, sweet-savoury base.

For seasoning, cooks reach for salt, soy sauce, mushroom seasoning, rock sugar, and vegan fish sauce made from pineapple, seaweed, or fermented soy — never anchovy nuoc mam. The result is lighter and cleaner than beef broth, but unmistakably pho. If you want to try it yourself, adapt the vegetable-broth approach from our guide to making pho at home.

What Are the Best Vegan Protein Options for Pho?

A satisfying bowl of pho chay isn't just broth and noodles — it needs texture and protein to stand in for the sliced meat. These are the plant proteins you will most often find, and the ones worth requesting when you build your own bowl:

Tofu and mushrooms are the workhorses of pho chay — tofu for substance, mushrooms for that meaty umami. If you keep the bowl gluten-free, note that seitan is wheat-based and off-limits, and mock meats vary. Round everything out with the classic pho garnish plate of Thai basil, bean sprouts, lime, and chili; our pho toppings and garnishes guide shows how to use them.

What Hidden Animal Ingredients Should Vegans Watch For?

A dish that looks vegetarian can still hide animal ingredients — most commonly in the broth base, the seasoning, and the noodles. Here is a quick reference for what is safely plant-based, what to avoid, and what to double-check before you order.

The two biggest culprits are fish sauce and chicken stock powder, both of which turn an apparently vegetable dish non-vegan without changing how it looks. Shrimp paste hides in some sauces the same way. Always ask specifically whether these are used — a well-meaning "it's vegetable" is not the same as "it's vegan."

On noodles and gluten: rice noodles (banh pho) are vegan and naturally gluten-free, but egg noodles are neither vegan nor gluten-free, and soy sauce, hoisin, and some vegan fish sauces contain wheat. If you manage celiac disease or a gluten sensitivity, treat this as general guidance and confirm every seasoning — and consult a dietitian for advice tailored to you. Our overview of the best noodles for pho explains the differences in detail.

What Other Vietnamese Dishes Are Vegan-Friendly?

Pho chay is a wonderful starting point, but Vietnamese cuisine offers plenty more for plant-based diners — thanks in large part to the same Buddhist chay tradition. When ordering any of these, apply the same rule: confirm the dish skips fish sauce, shrimp paste, chicken stock, and egg.

• Fresh spring rolls (goi cuon chay) — rice-paper rolls with fried or fresh tofu, vermicelli, lettuce, and herbs. Ask for a hoisin-peanut or soy dip rather than a fish-sauce-based nuoc cham.
• Vermicelli bowls (bun chay) — rice noodles topped with fried tofu, sautéed vegetables, herbs, and crushed peanuts, dressed with a vegan sauce.
• Tofu rice plates and stir-fries — steamed rice with tofu and vegetables, or a vegetable stir-fry seasoned with soy and mushroom sauce.
• Vietnamese iced coffee, made vegan — swap the sweetened condensed milk for a plant-based version or take it black over ice (ca phe den da).

For an at-home project, our Vietnamese spring rolls guide is easy to make fully vegan, and the wider Vietnamese food guide for Ottawa flags which dishes adapt best to a plant-based diet.

If you are dining with us, you can browse Pho By Night's vegan and vegetarian options before you visit, or see the full menu to plan a meal for a mixed group.

How Do You Order Vegan at a Vietnamese Restaurant?

A little know-how goes a long way. Most Vietnamese kitchens are very familiar with vegetarian requests — the chay tradition is part of the culture — so clear, specific questions tend to get you exactly what you want. Here is a practical checklist:

At Pho By Night in Ottawa's ByWard Market, we offer vegan and vegetarian options and are happy to talk through broth, seasonings, and preparation. Because our kitchen also cooks with meat and fish sauce, guests with strict plant-based needs are always welcome to ask — we would rather answer every question than leave you guessing.

Frequently Asked Questions About Vegan Pho