Dare level 1/5
Cà phê trứng
Egg coffee
A raw egg yolk, whipped with sugar and condensed milk into a thick foam, on top of black coffee. The warm-up round.
How to eat it: Spoon the foam first, then stir in the coffee from below.
Where: Café Giảng, 39 Nguyễn Hữu Huân, where it was invented.
Dare level 2/5
Chân gà nướng
Grilled chicken feet
Marinated in honey and chilli, grilled over charcoal, eaten with your fingers and a bowl of salt-pepper-lime. Lý Văn Phức street is lined with them at night: locals call it chicken street.
How to eat it: Bite between the joints. Leave the nails.
Where: Lý Văn Phức street, north-west of the Temple of Literature, from late afternoon.
Dare level 3/5
Bún đậu mắm tôm
Tofu, noodles and purple shrimp paste
The smell reaches you before the waiter does. Fermented shrimp paste, whipped with lime until it foams, for dipping fried tofu and noodles.
How to eat it: Whisk it yourself. Dip the tofu, never the herbs.
Where: Bún Đậu Cô Hoa, 25 Ấu Triệu, or Gốc Đa in Gạch alley.
Dare level 4/5
Trứng vịt lộn
Fertilised duck egg (balut)
A duck egg boiled with a nearly formed duckling inside. Hanoi eats it as a night snack, with Vietnamese mint, ginger and salt.
How to eat it: Crack the top, sip the broth, add salt, pepper and a leaf of mint, then eat it with a teaspoon. Don't look too closely.
Where: Night stalls and egg carts around the Old Quarter. Ask at any bia hơi.
Dare level 4/5
Nhộng xào lá chanh
Silkworm pupae with lime leaves
Stir-fried until they pop, with finely cut lime leaves. Nutty, a little creamy, and served with cold beer.
How to eat it: One at a time, in a single bite.
Where: On the menu at most bia hơi corners.
Dare level 5/5
Chả rươi
Sandworm omelette
Rươi are red-and-green worms from the brackish rice fields near Hanoi, in season only in October and November. They are mixed with egg, pork, dill and tangerine peel and fried into crisp patties. Hanoians wait all year for it.
How to eat it: With bún, herbs and fish sauce. It tastes rich and a little like crab. Honestly.
Where: Seasonal: look for hand-written “chả rươi” signs on Old Quarter restaurant doors. That's right now, in October.