Truffle Soy Dashi Glass Noodles in One Pan

Translucent sweet-potato glass noodles with the most addictive bounce, simmered straight into a dark shiitake dashi and glazed with black truffle soy butter. The whole dish comes together in one pan in about half an hour, and the result tastes like something from a high-end fusion restaurant. Chewy, glossy, deeply savory, and impossible to stop twirling.

This is a noodle dish built on one idea: let the starch do the work. Instead of boiling glass noodles separately and dressing them afterward, the sweet-potato noodles simmer directly in shiitake dashi, absorbing the broth as they cook. By the time they turn fully translucent, they are seasoned through, not just on the surface.

Around them, shiitake and king trumpet mushrooms sear in black truffle butter until meaty and browned, then get glazed with dark soy sauce and mirin into a syrupy, mahogany coating. The two halves meet in the same pan, the broth reducing into a glaze that clings to every strand. A shower of scallions and, if available, a few shavings of fresh black truffle finish the bowl. The technique takes one skillet, about fifteen minutes of prep, and roughly twenty minutes at the stove.

Ingredients

Why this recipe works

The trick that makes this dish work is cooking the noodles in the broth instead of beside it. Sweet-potato starch noodles are porous; when they simmer in dashi at around 203°F (95°C), they swell and drink the liquid into their core, so the umami is not a coating but part of the noodle itself. That is why each bite tastes seasoned from the inside, and why the bounce stays intact rather than turning waterlogged the way dressed-and-drained noodles often do.

The mushroom glaze plays the same game in reverse. Searing the shiitake and king trumpet mushrooms first drives off their water and concentrates flavor; the truffle butter then carries fat-soluble aromatics into every crevice.

Dark soy brings depth and color, mirin brings sweetness that balances the salt, and a quick reduction turns the pan juices into a lacquer. When the reduced broth and the glaze finally merge in the pan, emulsified by the butter, they create a clingy sauce that coats the noodles without needing cream, cornstarch, or extra effort.

Notes and substitutions

Choose firm, dry shiitakes and thick king trumpet mushrooms; the trumpets give the dish its meaty bite while the shiitakes contribute the deep, roasted note. Black truffle butter is sold in small tubs near the specialty cheeses in many supermarkets; if unavailable, see the substitution below.

Dark soy sauce, sometimes labeled dark or black soy, is thicker and less salty than regular soy, so do not substitute light soy one for one without reducing the amount. Mirin is a sweet rice wine found near the vinegar; it is essential for the glaze's shine. The dashi can be steeped from dried shiitake the day before or bought ready-made.

Equipment matters less than pan choice: use a wide, deep skillet, at least 12 inches, so the mushrooms sear rather than steam and the noodles have room to move in the simmering broth. Kitchen shears make quick work of snapping long noodle bundles.

A microplane or truffle shaver turns a small piece of fresh truffle into a cloud of shavings; skip it entirely rather than use truffle oil heavily, which can taste one-note. Sweet-potato glass noodles vary by brand, so start checking at four minutes.

• black truffle butter: Use 3 tbsp unsalted butter melted with 1 tsp truffle oil, or plain butter plus a few extra shavings at the end.
• shiitake dashi broth: Steep 0.5 oz dried shiitake in 2 cups hot water for 20 minutes, or use a light vegetable broth with a splash of soy.
• mirin: Swap in 2 tbsp sweet sherry or 1 tbsp rice vinegar mixed with 1 tsp sugar.
• sweet-potato glass noodles: Korean dangmyeon or any sweet-potato starch noodle works; cook time may shift by a minute.

Equipment

• Large deep skillet
• Wooden spoon
• Chef's knife
• Cutting board
• Kitchen shears
• Fine microplane or truffle shaver
• Measuring cups