Some of my most cherished childhood memories come from backyard barbecues with my family. While the typical American grill fired up hamburgers and hot dogs, my family always did things the Vietnamese way. We piled the grill with marinated short ribs, chicken wings, fresh oysters, and these chem chep nuong, grilled mussels. The smell of it grilling over hot coals, with some of the mussels’ juices falling over it, creating a steam cloud of all that flavor, was intoxicating. Now what I love most is how simple this dish really is. You take plump green mussels, top them with a few essential Vietnamese basics like mỡ hành (scallion oil) and nước chấm (fish sauce dip), and let the grill do the rest. It comes together in minutes, yet it punches far above its weight class and, in my opinion, makes a perfect summertime appetizer.
What Is Chem Chep Nuong?
Chèm chép nướng literally translates to grilled mussels. “Chèm chép” means mussels, and “nướng” means grilled. It’s a beloved street food along Vietnam’s coastline, where fresh shellfish is abundant, and grills run all evening long.
The magic of this recipe here is the combination of flavors. Warm scallion oil goes on first and bastes each mussel on the grill, soaking into the meat as it chars. Then a spoonful of fresh nuoc cham finishes every mussel the moment it comes off the heat, waking the whole thing up with that signature Vietnamese balance of salty, sweet, sour, and umami. Add crunchy fried shallots and roasted peanuts, and each bite gives you smoke, brightness, richness, and crunch all at once. That layering is what makes these mussels so hard to stop eating.
Ingredient Notes
New Zealand Greenshell mussels. These large green-edged mussels are my top pick because they arrive clean, plump, and already on the half shell. They come pre-cooked when frozen, which means you are really warming and charring them rather than cooking from raw. They’re larger than the fresh mussels you might find at your local grocery store, and are way easier to work with. These are my go-to for this recipe!
Scallion oil (mo hanh). Besides the mussels, this is the recipe’s backbone. Use a neutral oil so the green onion flavor shines, plus a pinch of salt and MSG to round it out. MSG deepens that savory backbone the way a pinch of salt lifts a dessert. If you prefer to leave it out, add a little extra salt or a pinch of sugar.
Fish Sauce Dipping Sauce (nuoc cham). My finishing sauce is pretty much the same sauce I use for dozens, if not hundreds, of other Vietnamese recipes on my page. It keeps things light and bright. Taste it before you serve, because your palate is the final word. If you want a bolder, saltier drizzle, add Dear Mam fish sauce a tablespoon at a time until it suits your taste. If you like it milder and cleaner, leave it exactly as written.
Fried shallots and crushed peanuts. Like the scallion oil and fish sauce, these are quintessential garnishes that show up in so many Vietnamese recipes. They deliver the crunch and toasty aroma that make the whole plate feel finished. Store-bought fried shallots work perfectly fine here, but I usually make my own in advance, since they keep in the fridge for months.
How to Make Chem Chep Nuong
Prep the mussels
Let the mussels thaw completely if they are frozen. Rinse them well and pull off any beard still clinging to the shell. Then, using a small knife, slide the blade under the mussel and cut the adductor muscle away from the shell to release the meat. This tiny step means that when you go to eat it, you can pop each mussel free in one clean bite. And for me, making food for other people is my biggest love language, and taking this extra step shows that I care not just about how the food tastes, but I’m thinking about the experience of eating the food and making it as enjoyable and easy as possible.
Make the scallion oil
Chop your green onions, separating the whites from the greens, and set the whites aside for another recipe. Warm the neutral oil in a pan or small pot over medium-high heat. Add the green onion greens, then season with the salt and MSG. Cook for 20 to 30 seconds, until the greens turn glossy and fragrant but stay bright green, then remove the pan from the heat.
Mix the nuoc cham
Stir together the Dear Mam fish sauce, monk fruit sweetener, filtered water, minced garlic, sliced Thai chili, and the juice of half a lime. Taste and adjust to your liking.
Grill the mussels and serve
Spoon a little scallion oil over each mussel. Grill over medium-high heat, around 375 to 400F, for 2 to 3 minutes, until hot and lightly charred at the edges. Move fast here, because these mussels are already cooked and you only want to warm them through. Transfer the grilled mussels to a serving platter, then finish each one with a spoonful of nuoc cham, and garnish with fried shallots and crushed peanuts. Serve hot and enjoy!
Frequently Asked Questions
What kind of mussels should I use? I love New Zealand Greenshell mussels, sometimes labeled green-lipped mussels. They are large, plump, and come frozen on the half shell already cleaned, which makes them ideal for grilling. The typical Blue or Pacific Blue are too small, in my opinion, to work for this recipe.
Do I need to cook the mussels from raw? No. Frozen Greenshell mussels come pre-cooked, so you are simply warming and charring them. That is why they should need only 2 to 3 minutes on the grill.
Why are my grilled mussels rubbery? Overcooking is almost always the culprit. Since these mussels are already cooked, pull them off the grill as soon as they’re hot to keep them tender and juicy.
Can I make this in the oven instead of on the grill? Yes. Arrange the topped mussels on a baking sheet and broil them for a few minutes until hot and lightly charred. Watch them closely so they don’t overcook.
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