The bánh mì baguette is not a French baguette with Vietnamese toppings. It is a different bread entirely. A specific blend of bread flour and rice flour, baked at high heat with steam injection, produces the thin, shattering crust that defines an authentic bánh mì. That crust is called the Glass Crust. It is the reason the bread holds fillings without going soggy, and the reason every bite starts with an audible crack.

This recipe produces four demi-baguettes using the Glass Crust method. The flour ratio is 87.5% bread flour to 12.5% rice flour. The steam phase runs exactly 8 minutes. The oven temperature drops from 475°F to 450°F for the final bake. Each of these numbers matters.

Read the full recipe before you start. Bread rewards preparation and punishes improvisation.

L. Nguyen

The Glass Crust Bánh Mì Baguette

The definitive bánh mì baguette recipe. A specific blend of bread flour and rice flour, combined with steam baking at high heat, produces the thin, shattering Glass Crust that defines an authentic bánh mì. [ INTERMEDIATE ]

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Prep Time 45

Cook Time 20

Rise Time 2 30

Total Time 4

Servings: 4 demi-baguettes

Course: Bread

Cuisine: Vietnamese

Ingredients Equipment Method Notes

Ingredients

The Dough

350 g high-protein bread flour King Arthur is the reliable choice. Look for 12.5% protein or higher on the bag.
50 g white rice flour
8 g fine sea salt
6 g instant yeast
10 g sugar
280 g water, at room temperature
15 g neutral oil grapeseed or vegetable

For Baking

1 cup boiling water

Equipment

Demi-baguette pan
Baking stone or steel
Lame or single-edge razor blade
Kitchen scale
Stand mixer with dough hook

Method

Add the bread flour, rice flour, salt, yeast, and sugar to the bowl of your stand mixer. Give the dry ingredients a quick stir to combine. Add the water and oil. Mix on low speed for 3 minutes until the dough comes together. Turn up to medium speed and knead for 7 minutes. When it is done, the dough should be smooth and slightly sticky. It will feel softer than bread dough you may have made before. That is intentional. Mixing by hand: Stir until the dough comes together, then turn it out onto a clean counter and knead for 10 to 12 minutes. You will know it is ready when the surface feels smooth and the dough stretches without tearing.
Put the dough in a lightly oiled bowl and cover it with plastic wrap. Leave it at room temperature for about 90 minutes, until it has doubled in size. Do not rush this step. The flavor develops during the rise.
Turn the dough out onto a clean counter. Do not flour the surface. Cut the dough into 4 equal pieces. Each piece should weigh about 178 grams. To shape each piece: press it gently into a rough rectangle with your hands. Fold the two long edges in toward the center, like closing a letter. Press the seam closed with your fingertips. Then roll it gently back and forth under your palms until you have a cylinder about 9 to 10 inches long with slightly tapered ends. Place each shaped baguette seam-side down in the baguette pan. The dough is soft, so work gently.
Cover the shaped baguettes loosely with plastic wrap. Let them rise for 45 to 60 minutes. They are ready when they look puffy and a light poke with your finger leaves a dent that fills back in slowly. While the dough is rising, set up your oven. Place your baking stone or steel on the middle rack. Place an empty metal pan on the bottom rack. Set the oven to 475°F. Let it preheat for at least 45 minutes. The stone needs a full 45 minutes to heat through. This is the step most home bakers skip, and it is why their crust does not turn out right.
Using your lame or razor blade, cut 3 to 4 diagonal slashes across the top of each baguette. Hold the blade at a shallow angle and cut with one clean motion. Do not saw back and forth. The scores allow the bread to expand in the oven. They also create the ridged surface that is characteristic of a proper bánh mì baguette.
Have your cup of boiling water ready before you open the oven. Slide the baguette pan onto the hot stone. Immediately pour the boiling water into the empty metal pan on the bottom rack. Close the oven door quickly to trap the steam inside. Bake for 8 minutes with the steam. The steam is what makes the Glass Crust possible. It keeps the surface of the dough moist during the first phase of baking, which allows the bread to expand fully before the crust sets. Take the steam away too early and the crust thickens. Leave it too long and the crust never gets crispy. Eight minutes is the target.
After 8 minutes, carefully remove the steam pan from the oven. Lower the temperature to 450°F. Keep baking for 12 to 15 minutes until the baguettes are deep golden brown. To check if they are done: pick one up and tap the bottom. It should sound hollow. The crust will feel hard when you pull it out. That is what you want.
Transfer the baguettes to a wire rack. Wait at least 20 minutes before cutting into them. The bread is still finishing inside during this time. Steam is escaping through the crust, and that process is part of what makes the Glass Crust set properly. Cut too soon and the inside will be gummy. Twenty minutes is worth it.

Notes

A note on measuring: use a kitchen scale. Volume measurements like cups and tablespoons are not precise enough for bread. Weight is the only way to get consistent results.

Read the full recipe before you start.

[ THE SCIENCE ]

A standard French baguette uses 100% wheat flour. The gluten network that forms during kneading produces a crust that is thick, chewy, and strong enough to hold its shape for hours.

The bánh mì baguette uses a different formula: 87.5% bread flour, 12.5% rice flour. Rice flour contains no gluten. When it is mixed into the dough, it interrupts the gluten network in the outer layer of the bread. The result is a crust that forms thin and brittle instead of thick and chewy.

Steam does the other half of the work. When you close the oven door with a pan of boiling water inside, the steam keeps the surface of the dough moist. Moist dough expands freely. The bread grows to its full size before the crust sets. When the steam is removed at 8 minutes, the surface dries rapidly in the high heat and forms the thin, hard shell you can hear when you tap it.

Remove the steam too early and the crust sets before the bread has fully expanded. Leave it too long and the surface never dries enough to become brittle. Eight minutes is not a suggestion.

[ THE FAQ ]

Q: What makes bánh mì bread different from a French baguette? A: Two things: the flour blend and the purpose. French baguettes use 100% wheat flour and are designed to be eaten with butter or cheese. The thick, chewy crust is the point. Bánh mì baguettes replace some of the wheat flour with rice flour, which produces a thin, brittle crust designed to hold fillings without overpowering them. Same shape. Completely different logic.

Q: Can I use all-purpose flour instead of bread flour? A: Yes, but the results will be slightly different. Bread flour has more protein, which gives the crumb better structure and the crust more crunch. If all-purpose is all you have, use it. The Glass Crust will still form. It just will not be quite as pronounced.

Q: Do I really need a baking stone? A: For the best results, yes. The stone holds heat and delivers it directly to the bottom of the baguette, which drives the rapid crust formation you need for the Glass Crust. A regular sheet pan works but produces a softer bottom crust.

Q: How long do these keep? A: They are best within 4 hours of baking. The crust naturally softens overnight. To bring it back, put the baguettes in a 400°F oven for 4 minutes. Do not refrigerate them. Cold air makes bread go stale faster.

[ THE EQUIPMENT ]

The Glass Crust requires the right tools. A baking stone or steel delivers the direct heat needed for rapid crust formation. A demi-baguette pan holds the shape during the rise. A lame scores the surface cleanly so the bread expands in the right direction. And once it comes out of the oven, a 10-inch offset serrated bread knife is the only blade that cuts through the glass crust without crushing it.

The full equipment list with specific recommendations is on the Equipment page.

[ WHAT TO READ NEXT ]

The bread is only half the equation. The Classic Bánh Mì Thịt Nguội recipe uses this baguette as its foundation. Cold cuts, pickled daikon and carrot, pâté, and mayonnaise assembled in a specific order for a specific reason.

The Equipment page covers every tool referenced in this recipe with specific product recommendations.