Bún Mắm in Adelaide Chinatown — Mekong Fermented Fish Noodle Soup

★ As featured in Glam Adelaide — 2025 SA Restaurant & Catering Awards finalist

On Grote Street in the heart of Adelaide Chinatown, Bún Mắm is the Mekong Delta's boldest noodle soup — a deep, savoury broth built on fermented fish, ladled over thick round rice vermicelli with prawns, squid, pork slices, chả lụa and soft cooked eggplant. It arrives steaming with snipped chives on top and a side plate of fresh herbs, lettuce, a lemon wedge and dipping sauces. It's not a subtle bowl, and that's exactly the point.

What is Bún Mắm?

Bún Mắm is often called the "gumbo of Vietnam" — a rich, amber-hued noodle soup from the Mekong Delta whose backbone is mắm, fermented fish. The fermentation is what gives the broth its depth: layered, savoury, a little funky in the best way, and completely different from the clean, aromatic character of phở. It's a dish of the south's river country, where fermented fish has been a pantry staple for generations, and it belongs to the same Southern Vietnamese tradition that Bà Năm Lời has been cooking from her home kitchen in Trảng Bàng, Tây Ninh since the 1970s.

Bà Năm opened on Grote Street in Adelaide Chinatown in 2023, founded by Huynh Nguyen and Thi Gai Vo and shaped by those family recipes. The goal was never a polished, watered-down version of Vietnamese food. As we like to say, we're not a luxury venue, just very genuine — and Bún Mắm is exactly the kind of dish that phrase was made for. It's not shy. It's not meant to be.

What's in the bowl

Our Bún Mắm ($25) arrives in a white Bà Năm bowl with a golden, amber broth over thick round rice vermicelli — noticeably fatter than the thin strands you'd find in a phở bowl, built to carry a heavier soup. On top sits a proper Mekong spread:

Prawns and squid for the seafood side of the delta, pork slices and chả lụa (Vietnamese pork loaf) for richness, and cooked eggplant — the quiet hero of Bún Mắm, soaking up the broth like a sponge. A generous pile of snipped chives finishes the bowl, and it comes with a side plate of fresh herbs and lettuce, a lemon wedge, and small dipping sauces so you can build each mouthful your own way.

The same kitchen ethos applies here as everywhere else at Bà Năm: slow, patient cooking and no shortcuts. Our famous 18-hour bone broth and the Phở Tái "red coin" of paper-thin rare beef cooked in the bowl are a phở story — a different tradition entirely — but the philosophy behind them, that good soup can't be rushed, runs through every pot on the stove, Bún Mắm included. Huynh's Sunday farm runs and locally sourced beef keep the rest of the menu honest, and the same care goes into this bowl.

How it sits next to phở and Bún Bò Huế

If you're mapping out our Vietnamese noodle soups, think of it as a spectrum of intensity. At one end is Phở Tái ($20/$22, or $25 as Phở Thố Đá) — the clean, aromatic beef broth, famous here for the "red coin" of paper-thin rare beef that cooks in the bowl under boiling 18-hour broth. It's the dish behind our reputation as a contender for the best phở in Adelaide.

In the middle sits Bún Bò Huế ($20/$22, or $25 in the stone bowl) — spicy, lemongrass-driven, from central Vietnam. Then there's Hủ Tiếu Nam Vang ($22), the lighter Phnom Penh-style pork and seafood soup, plus Mì Quảng ($22) and Bún Riêu ($22) rounding out the family.

Bún Mắm sits at the bold end of that spectrum. Where phở whispers, Bún Mắm speaks up. The fermented fish base gives it a savoury depth that no other bowl on our menu matches — closer in spirit to a hearty seafood stew than a delicate broth.

From Trảng Bàng to Grote Street

Bà Năm is named for Bà Năm Lời, who has been cooking in Trảng Bàng, Tây Ninh since the 1970s. Founders Huynh Nguyen and Thi Gai Vo opened the Adelaide restaurant in 2023 to carry that unhurried kitchen ethos across. It's the same patience behind the house phở — an 18-hour bone broth made from real bones, no shortcuts, finished with the Phở Tái "red coin". Bún Mắm is a different tradition entirely, a Mekong fermented-fish soup rather than a beef broth, but it comes from the same slow, honest kitchen.

That approach earned us a spot as a 2025 Hostplus SA Restaurant & Catering Awards finalist in the Vietnamese Restaurant category, with coverage in Glam Adelaide along the way — recognition we're proud of, though the real measure is the bowls going out seven days a week. We're not a luxury venue, just very genuine.

Who it's for (and when to order it)

Honest answer: Bún Mắm is for the adventurous and the homesick. If you grew up with Mekong cooking, one spoonful will take you straight back. If you're new to it, come with an open mind — the "fermented fish" label sounds more confronting than the eating experience actually is. The broth is deep and savoury rather than aggressively fishy, and the herbs, lettuce and lemon on the side let you brighten and balance each bite.

It's a brilliant cold-weather bowl, a great pick when you've already ticked phở and Bún Bò Huế off your list, and an easy way to look like you know your way around a Vietnamese menu. If you're ordering for a mixed table, pair it with a phở for the cautious eater and you've covered both ends of the spectrum.

Where to find bún mắm in Adelaide Chinatown and the CBD

Bà Năm sits at 65 Grote Street, in the heart of Adelaide Chinatown and an easy walk from most of the CBD — if you're hunting Vietnamese food in the Adelaide CBD, this corner of Grote Street is where to start. Bún Mắm is $25 and comes with the works: thick round rice vermicelli, prawns, squid, pork slices, chả lụa and cooked eggplant, plus the fresh herb plate on the side.

It shares the menu with a full family of sibling soups: spicy Bún Bò Huế ($20/$22, or $25 in the stone bowl), Phở Tái with its red coin and the 18-hour broth story ($20/$22, Phở Thố Đá $25), Hủ Tiếu Nam Vang ($22), Mì Quảng ($22) and Bún Riêu ($22) — the full line-up lives in our noodle soups guide. Open seven days, 11am–9pm (until 9:30pm October–March), public holidays included. Fair warning: at peak times there's an honest 15–30 minute wait. You can book through OpenTable, call (08) 8151 0106 — groups of 8 or more should ring ahead — or order via the app at order.phobanam.com.au.

Visiting Bà Năm

You'll find us at 65 Grote Street, Adelaide SA 5000, right in Adelaide Chinatown. We're open 11am–9pm daily, stretching to 9:30pm over summer (October to March), public holidays included.

Walk-ins are welcome, and you can book online via OpenTable — though we'll be upfront: at peak times you might wait 15–30 minutes. Groups of 8 or more, give us a ring on (08) 8151 0106 so we can sort you out. Prefer to order ahead? Browse via our app at order.phobanam.com.au.

Frequently asked questions

What is Bún Mắm, exactly?

Bún Mắm is a Mekong Delta noodle soup built on a fermented fish broth, served over thick round rice vermicelli. At Bà Năm, our version comes with prawns, squid, pork slices, chả lụa (Vietnamese pork loaf) and cooked eggplant, topped with snipped chives and served with fresh herbs, lettuce, a lemon wedge and dipping sauces on the side.

Is Bún Mắm very fishy or intense?

It's bolder than phở — that's the point — but "fermented fish" sounds scarier than it tastes. The broth is deep, savoury and layered rather than sharply fishy, and the fresh herbs, lettuce and lemon served alongside let you brighten and balance every spoonful. If you enjoy big-flavoured food, you'll likely love it.

How much does Bún Mắm cost at Bà Năm?

Bún Mắm is $25 at Bà Năm Restaurant, 65 Grote Street, Adelaide Chinatown. It sits alongside our other noodle soups including Phở Bò ($20/$22), Phở Thố Đá ($25), Bún Bò Huế ($20/$22, stone bowl $25), Hủ Tiếu Nam Vang ($22), Mì Quảng ($22) and Bún Riêu ($22). You can browse the full menu in-store or via our app at order.phobanam.com.au.

How is Bún Mắm different from phở or Bún Bò Huế?

Phở is a clean, aromatic beef soup — ours is built on an 18-hour bone broth with real bones and no shortcuts. Bún Bò Huế is spicy and lemongrass-forward, from central Vietnam. Bún Mắm is a different tradition again: a Mekong Delta soup with a fermented fish base, thicker noodles, and a mix of seafood, pork and eggplant. It's the boldest, most savoury bowl of the three.

Do I need to book, and what are your hours?

Walk-ins are welcome, and you can book online via OpenTable. Open 11am–9pm daily (until 9:30pm over summer, October to March), public holidays included, at 65 Grote Street in Adelaide Chinatown. At peak times there can be an honest 15–30 minute wait. For groups of 8 or more, please call us on (08) 8151 0106 so we can look after you properly. You can also order ahead at order.phobanam.com.au.

Where can I get bún mắm (Mekong fermented fish noodle soup) in Adelaide CBD or Chinatown?

Bà Năm serves Bún Mắm for $25 at 65 Grote Street in Adelaide Chinatown, a short walk from most of the CBD. Fair warning: this is a genuinely fermented-fish broth — deep and savoury the way the Mekong Delta makes it — so it's a bowl for people who want the real thing, not a toned-down version. The restaurant is open seven days, 11am–9pm (until 9:30pm October–March), including public holidays. At peak times expect an honest 15–30 minute wait. Book via OpenTable, call (08) 8151 0106 (groups of 8+ should call ahead), or order through the app at order.phobanam.com.au.