What are banh pho?
The noodles in pho have a name: banh pho. They are flat, white rice noodles made from rice flour and water -- nothing else. No egg, no wheat, no additives in a traditional version. That simplicity is what gives them their character: a clean, neutral flavour that absorbs the broth around them without competing with it, and a texture that is slippery and soft but with just enough body to feel substantial.
Rice noodles have been eaten across Southeast Asia for centuries, but banh pho are specific to Vietnamese cooking -- the width, the way they are cut, and crucially the way they are prepared for the bowl are all particular to pho. You cannot substitute another noodle and get the same result. The dish is named after them. Pho, many food historians believe, is a Vietnamese corruption of fen -- the Cantonese word for rice noodle.
Rice noodles are noodles made with rice flour and water as the principal ingredients. Sometimes ingredients such as tapioca or corn starch are added in order to improve the transparency or increase the gelatinous and chewy texture of the noodles. Rice noodles are most common in the cuisines of China, India and Southeast Asia. They are available fresh, frozen, or dried, in various shapes, thicknesses and textures. Fresh noodles are also highly perishable; their shelf life may be just several days.
Content sourced from Rice noodles on Wikipedia, licensed under CC BY-SA 4.0.
Width, texture, and what they do to the bowl
Banh pho come in several widths, and width is not just aesthetics -- it changes the eating experience in ways that matter. Wider noodles have more surface area, absorb more broth, and deliver a chewier bite. Narrower noodles are more delicate, cook faster, and slip through the broth more easily. The broth-to-noodle ratio per mouthful is completely different between a wide and narrow noodle.
Narrow (3-5mm)
Delicate and quick-cooking. Common in southern Vietnamese style pho and in restaurants catering to a lighter eating preference. They slurp easily and sit lightly in the bowl. The broth dominates when noodles are this thin.
Medium (5-8mm)
The standard width at the majority of pho restaurants worldwide. Enough body to feel substantial, thin enough to stay delicate. The sweet spot between holding broth and yielding to the chopstick. If a menu does not specify, this is what you are getting.
Wide (8-12mm)
Traditional in northern Vietnamese pho. More assertive, more chew, more presence in the bowl. The noodle competes with the broth rather than yielding to it -- which is the point in the northern style, where every element is expected to pull its weight.
If a restaurant lets you choose your noodle width, go wide at least once. It is a genuinely different eating experience from the same bowl with narrow noodles, and most people who try it develop a strong preference one way or the other.
Fresh vs dried -- it matters more than you think
Banh pho come in two forms: fresh and dried. Most restaurants use one or the other consistently, and which they use tells you something about the kitchen.
Fresh banh pho
Fresh noodles are made or delivered daily. They are softer, silkier, and more delicate. They cook in seconds in boiling water. They have a subtle sweetness from the rice and a texture that clings slightly to the broth. In Vietnam, fresh noodles are the standard.
Outside Vietnam, fresh banh pho are harder to find because they have a short shelf life. Restaurants that use them either make them in-house or receive daily deliveries from a local producer. Both signal a kitchen that cares.
- Silkier texture
- More delicate
- Subtly sweet
- Short shelf life
- The traditional choice
Dried banh pho
Dried noodles are the practical solution for most restaurants outside Asia. When properly rehydrated and cooked, a good dried banh pho can be excellent -- firm, clean, consistent. The key word is properly. Undersoaked dried noodles are chalky and brittle. Overcooked ones turn to mush.
Most of the pho you will eat outside Vietnam uses dried noodles, and most of the time you will not notice -- which is a testament to how good a quality dried noodle can be when handled correctly.
- Firmer texture
- More consistent
- Long shelf life
- Widely available
- Quality varies by brand
How the noodles are cooked in the restaurant
In a traditional pho kitchen, the noodles are never cooked in the broth. That would cloud the broth and destroy its clarity -- one of the defining qualities of great pho. Instead, the noodles are cooked separately in a dedicated pot of plain boiling water.
The cook blanches a portion of noodles in a wire basket, shakes off the excess water, and places them directly in the bowl. Hot broth is then ladled over the top. The broth finishes warming the noodles and the noodles begin absorbing the broth immediately. This is why a bowl of pho should be eaten quickly -- the longer the noodles sit in the broth, the softer and more waterlogged they become.
The first five minutes of a bowl of pho are the best five minutes. The noodles are at their peak. Do not let them wait.
How the noodles differ: North vs South
The north-south divide in pho extends to the noodles. Northern pho (pho Bac) traditionally uses wider, chewier noodles. The bowl is more austere and the noodle is expected to provide substance. Southern pho (pho Nam) uses narrower, more delicate noodles -- the bowl is more generous overall so the noodle does not need to carry as much weight.
Most pho restaurants outside Vietnam serve southern-style pho, which means narrower to medium noodles are the global norm. If you find a restaurant serving wider noodles and calling it northern style, that is worth paying attention to -- it suggests the kitchen has thought carefully about what they are making.
Ask your server what style of noodle the restaurant uses. Any good pho restaurant will know the answer and many will be genuinely pleased you asked. It is a signal that you are paying attention.
Cooking banh pho at home
Dried banh pho are widely available in Asian grocery stores and increasingly in mainstream supermarkets. They come in several widths -- look for the width designation on the packet, usually given in millimetres or as S/M/L. For home pho, medium width is the most forgiving.
The most important thing with dried banh pho at home is the soak. Do not skip it. Soak the noodles in cold water for at least 30 minutes before cooking -- some cooks soak for an hour. The noodle should be pliable and almost translucent before it goes into boiling water. After soaking, it needs only 1-2 minutes in a rolling boil before it is done. Drain immediately and rinse briefly with cold water to stop the cooking, then transfer straight to the bowl.
Fresh banh pho, if you can find them (look in the refrigerated section of Asian grocery stores), need no soaking. They go straight from the package into boiling water for 20-30 seconds. Handle them gently -- they tear easily and tangle if rushed.