Soft, slightly chewy Vietnamese steamed rice cakes are topped with savory dried shrimp, mung beans, scallion oil, and Vietnamese dipping sauce. Each cake is steamed in a small dish and served warm with the toppings spooned over the top.
Soak the ingredients. Soak the mung beans overnight and the dried shrimp for at least 2 hours.
Cook the mung beans. Boil the mung beans until very soft, about 30 minutes. Drain if needed, mash until smooth, and season with salt.
Prepare the shrimp. Drain the soaked shrimp well and finely chop or pulse in a food processor.
Cook the shrimp. Heat 1 tablespoon of oil in a skillet over medium heat. Cook the shrimp for 8–10 minutes, stirring occasionally, until dry and crumbly. Set aside.
Make the Batter
Mix the batter. Whisk together the rice flour, tapioca flour, salt, water, and vegetable oil until smooth.
Rest. Let the batter sit for 30 minutes.
Steam the Rice Cakes
Prepare the steamer. Bring the water to a simmer and lightly oil the small bowls or saucers.
Stir the batter. Mix it thoroughly again before pouring because the rice flour will settle as it sits.
Fill the dishes. Pour about 1 tablespoon of batter into each bowl.
Steam. Cover and steam for 6–8 minutes, or until the rice cakes are set, opaque, and slightly springy.
Repeat. Steam the remaining batter in batches, stirring the batter again before each batch.
Make the Scallion Oil
Heat the oil in a small saucepan over medium heat. Add the green onions and salt and cook for 2–3 minutes, until softened and fragrant.
Make the Dipping Sauce
Stir together the fish sauce, water, sugar, lime juice, garlic, and chili until the sugar dissolves.
Assemble
Top each rice cake with mung beans, dried shrimp, and scallion oil.
Serve warm with Vietnamese dipping sauce on the side.
Notes
Use regular rice flour, not glutinous or sweet rice flour.
Let the batter rest for 30 minutes before steaming.
Stir the batter well before every batch because the flour settles.
Lightly oil the dishes so the rice cakes release easily.
Wrap the steamer lid with a clean kitchen towel if condensation is dripping onto the cakes.
Different bowl sizes may need slightly different steaming times.
The cakes are done when they are set, opaque, and slightly springy.
Store the rice cakes and toppings separately in the refrigerator for up to 3 days.