How Long Does It Take to Make Pho?

Quick Answer

Traditional pho takes 6–12 hours from start to finish, with the bone broth simmering for 4–10 hours depending on the recipe. The actual hands-on time is only about 30–45 minutes. Pressure cooker methods can produce a respectable pho in 1.5–2 hours total.

Traditional Pho Timeline

Step	Time
Parboil and clean bones	15–20 minutes
Char onions and ginger	10–15 minutes
Toast spices	3–5 minutes
Simmer broth (beef pho)	6–10 hours
Simmer broth (chicken pho)	2–4 hours
Cook rice noodles	5–10 minutes
Prepare garnishes	10–15 minutes
Assemble bowls	5 minutes
Total (beef pho)	7–12 hours
Total (chicken pho)	3–5 hours

The Broth: Why It Takes So Long

Pho broth is the soul of the dish, and its depth of flavor comes from extended simmering. Beef bones — typically a mix of marrow bones, knuckle bones, and oxtail — release collagen, gelatin, and minerals over many hours. This produces the rich, clear, slightly viscous broth that defines authentic pho.

Step 1: Parboiling (15–20 Minutes)

Place bones in a large stockpot, cover with cold water, and bring to a rolling boil. Boil for 10–15 minutes, then drain and rinse the bones thoroughly. This step removes impurities and blood, resulting in a clearer broth.

Step 2: Charring Aromatics (10–15 Minutes)

Char whole onions (halved) and unpeeled ginger under a broiler or directly over a gas flame until deeply blackened in spots. Charring adds a smoky sweetness that is essential to pho's flavor profile.

Step 3: Toasting Spices (3–5 Minutes)

Dry-toast whole spices in a skillet over medium heat until fragrant. The classic pho spice blend includes star anise, cinnamon stick (preferably Vietnamese cassia), whole cloves, coriander seeds, and fennel seeds. Place toasted spices in a cheesecloth sachet or spice ball for easy removal.

Step 4: The Long Simmer (4–10 Hours)

Combine cleaned bones, charred aromatics, spice sachet, fish sauce, and rock sugar in a large stockpot with fresh water. Bring to a boil, then reduce to a gentle simmer. Skim any foam or fat that rises to the surface during the first 30 minutes.

For beef pho (pho bo), simmer for 6–10 hours. Some cooks go as long as 12 hours for maximum richness. For chicken pho (pho ga), 2–4 hours is sufficient since chicken bones break down faster.

Pressure Cooker Shortcut

A pressure cooker or Instant Pot can dramatically reduce broth time.

Method	Broth Time	Total Time
Stovetop (beef)	6–10 hours	7–12 hours
Stovetop (chicken)	2–4 hours	3–5 hours
Pressure cooker (beef)	45–90 minutes	1.5–2.5 hours
Pressure cooker (chicken)	30–45 minutes	1–1.5 hours

Preparing the Noodles and Garnishes

While the broth simmers, there is little active work. In the final 20–30 minutes, prepare the remaining components.

• Rice noodles (banh pho): Soak dried noodles in warm water for 20–30 minutes, then cook in boiling water for 30 seconds–1 minute. Fresh noodles need only a brief blanch.
• Meat: Slice raw beef (eye of round or sirloin) paper-thin against the grain. The hot broth will cook it in the bowl. For chicken pho, shred poached chicken.
• Garnish plate: Prepare bean sprouts, Thai basil, lime wedges, sliced jalapeños or bird's eye chilies, cilantro, and hoisin and sriracha sauces.

Assembly (5 Minutes)

Place cooked noodles in a bowl, arrange sliced meat on top, and ladle boiling-hot broth over everything. The broth cooks the raw beef instantly. Serve with the garnish plate on the side.

Tips for the Best Pho

• Never let the broth boil hard: A vigorous boil makes the broth cloudy. A gentle simmer with occasional bubbles produces the clearest broth.
• Skim diligently: Remove fat and foam during the first hour for a clean-tasting broth.
• Season at the end: Add fish sauce, salt, and sugar to taste after straining. This gives you full control over the final flavor.
• Make broth ahead: Pho broth actually improves overnight in the refrigerator. The fat solidifies on top and can be easily removed.