Bánh bò is a Vietnamese rice-flour cake known for its springy, honeycomb-like interior, often flavored with coconut and pandan. This steamed version uses yeast to create its airy texture and makes a sweet snack that is delicious warm or at room temperature.
Ingredients
- 1 1/2 cups (240 g) rice flour
- 3/4 cup (90 g) tapioca starch
- 1/2 cup (100 g) granulated sugar, divided
- 1/2 teaspoon (3 g) fine salt
- 1/2 cup (120 ml) warm water, about 105–110°F (40–43°C)
- 2 1/4 teaspoons (7 g) instant yeast
- 1 cup (240 ml) full-fat coconut milk, warmed but not hot
- 1 teaspoon (5 ml) pandan extract, optional
- 1 teaspoon (5 ml) neutral oil, for greasing the pan
Instructions
- Activate the yeast. Stir the warm water with 1 teaspoon of the measured sugar in a small bowl, then sprinkle the yeast over it. Leave it for 10 minutes. It should look foamy or show small bubbles; if it stays completely flat, the yeast may be inactive, so start again with fresh yeast before mixing the batter.
- Mix the dry ingredients. In a large bowl, whisk together the rice flour, tapioca starch, remaining sugar, and salt. Break up any flour lumps now, since whisking them out later can knock air from the fermenting batter.
- Make the batter. Whisk the coconut milk and pandan extract into the yeast mixture. Pour the liquid into the dry ingredients in a steady stream, whisking until smooth. The batter should be pourable, similar to thin pancake batter. Cover the bowl with a clean plate or plastic wrap.
- Let it ferment. Set the bowl in a comfortably warm, draft-free place for 75 minutes. The surface should have bubbles and look slightly risen. Fermentation time varies with room temperature, so look for those signs rather than expecting a dramatic doubling. If your room is cool, allow more time until bubbles appear.
- Prepare the steamer and pan. Add enough water to a large pot or steamer to last through cooking, making sure it will not touch the pan. Bring the water to a steady simmer. Lightly grease an 8-inch (20 cm) round cake pan with the oil, then set the pan in the steamer for 5 minutes to heat. Keep the lid wrapped in a clean kitchen towel, tying or securing it well away from the burner so condensation will not drip onto the cake.
- Fill and steam. Give the batter one gentle stir to redistribute any flour that has settled, taking care not to beat out all the bubbles. Pour it into the hot pan. Cover and steam over medium heat for 25 minutes, keeping the water at a steady simmer rather than a hard boil. Avoid lifting the lid during the first 20 minutes, when the cake is setting.
- Check, rest, and unmold. The cake is ready when the center feels set and a skewer inserted in the middle comes out without wet batter. If it is still liquid, cover and steam for another 5 minutes. Turn off the heat and let the cake sit covered for 10 minutes, then lift it out carefully. Cool it in the pan until safe to handle, loosen the edge with a thin knife, and turn it onto a board. Cut into 8 wedges or small squares.
Tips
- Keep the liquids warm, not hot. Very hot water or coconut milk can damage the yeast and prevent the cake from developing its characteristic pores. If you do not have a thermometer, the liquid should feel gently warm rather than hot against your wrist.
- Choose the right flour. Rice flour and tapioca starch are not interchangeable: rice flour supplies the cake’s body, while tapioca gives it a pleasantly chewy bite. If you cannot find tapioca starch, substitute cornstarch by weight; the cake will be less elastic and more tender, so avoid cutting it while piping hot.
- Use a covered steamer that fits the pan. A lid that seals reasonably well helps the cake cook evenly. Wrapping the lid with a towel catches condensation; make sure no towel edge can hang near a gas flame or other heat source.
- Do not judge fermentation only by the clock. The batter should show surface bubbles before steaming. A cold kitchen slows yeast, while a very hot spot can make it ferment too quickly and weaken the structure. Keep it in a gently warm place and check its appearance.
Serving Suggestions
Serve bánh bò warm, once it has had time to set, or let it cool to room temperature for a firmer, chewier texture. Its mild sweetness and coconut aroma pair well with hot Vietnamese coffee or unsweetened tea. For a more traditional coconut-forward presentation, spoon a little warm coconut cream over each portion and add a pinch of toasted sesame seeds. Keep toppings light: a heavy pour of sauce can mask the delicate pandan and make the porous cake soggy.
The cake is also easy to portion for a snack table. Cut the round into wedges for a simple presentation, or into small squares if serving several sweets. A fork works, but the springy texture is often easiest to enjoy in a few bites. If serving it after chilling, let pieces sit out briefly so the coconut aroma is more noticeable.
Variations
Pandan-free bánh bò: Leave out the pandan extract for a pale, coconut-scented cake. If pandan extract is difficult to find, a small amount of pandan paste is a practical substitute, though it may add stronger color and a more concentrated flavor; use it sparingly and follow its package strength rather than swapping in a large amount. You can also use 1 teaspoon (5 ml) vanilla extract for a different but pleasant aroma.
More coconut flavor: Replace 2 tablespoons (30 ml) of the warm water with additional coconut milk. This makes the flavor richer; keep the total liquid the same so the batter does not become too loose. Full-fat canned coconut milk gives a rounder taste than a thin coconut beverage.
Small steamed cakes: Instead of one round pan, divide the batter among lightly greased heatproof cups, leaving room for it to rise. Smaller cakes may cook faster, so begin checking around 12–15 minutes; the exact time depends on cup size and steamer arrangement. Steam in batches if needed, keeping unused batter covered. In Vietnam, bánh bò has regional and family variations, including versions with different shapes, colors, flavors, and methods; this recipe is one home-friendly steamed style rather than a single definitive version.
Storage and Reheating
Cool the cake promptly and refrigerate it within 2 hours of cooking. Store covered in an airtight container for 3–4 days. Refrigeration firms the starches, so the texture will be denser and less tender than when freshly steamed. For best quality, keep the cake plain and add coconut cream or other toppings just before serving.
To reheat, place a portion in a steamer for about 5–8 minutes, until hot throughout, or microwave it covered with a few drops of water in short bursts. For food safety, USDA guidance is to reheat leftovers to 165°F (74°C); use a food thermometer to check the center if reheating a larger portion. Avoid repeatedly warming and cooling the same cake: reheat only what you plan to eat. You can freeze wrapped portions for up to 2 months, though freezing may make the honeycomb crumb a little less springy. Thaw in the refrigerator, then steam until hot.
Frequently Asked Questions
Why didn’t my bánh bò develop a honeycomb texture?
Common causes are inactive yeast, batter that did not ferment long enough, or a steamer that was not producing steady steam. Look for bubbles before cooking and keep the lid closed while the cake sets. Measuring the rice flour and tapioca starch by weight also helps avoid a batter that is too thick.
Can I make the batter ahead?
It is best to steam it after the 75-minute fermentation, when the yeast has made visible bubbles. A long delay can cause the batter to over-ferment and lose strength. If you need to plan ahead, measure the dry ingredients in advance, then mix and ferment shortly before steaming.
Can I use regular all-purpose flour?
Not as a direct substitute. Wheat flour contains gluten and will produce a different, breadier cake rather than the characteristic rice-based chew and open crumb. Rice flour is central to this style of bánh bò, and tapioca starch helps create its elastic texture.
Can I cook this in an oven instead of steaming?
This recipe is designed for steaming, which gives the cake a moist, tender crumb. Baking changes the surface and texture, and the result will not be the same as bánh bò hấp. Use a separate baked bánh bò recipe if you want an oven method rather than simply transferring this batter to an oven.
What if I do not have pandan extract?
Simply omit it; the cake will still have coconut flavor and the fermented rice-cake texture. Vanilla is an easy alternative, but it changes the aroma. Pandan paste can also work, although it is often more concentrated and may color the batter more strongly.
How do I know the center is cooked?
The surface should look set, and a skewer in the center should come out without loose, wet batter. If the middle still wobbles or leaves raw batter on the skewer, steam for another 5 minutes and check again. Letting the cake rest covered for 10 minutes after steaming helps it finish settling before you unmold it.
Related
- Vietnamese Word for Food: Meaning and Rice Recipe
- Vietnamese Pickled Vegetables: Easy Đồ Chua Recipe
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