Place the cooked noodles in a large mixing bowl while still warm so they absorb the sauce more easily.

Add minced garlic, chili flakes, green onions, sesame seeds, salt, and black pepper directly over the noodles.

Heat the neutral oil in a small saucepan until shimmering and very hot but not smoking.

Carefully pour the hot oil over the garlic and chili mixture and listen for the fragrant sizzling sound as the aromatics bloom.

Add soy sauce, dark soy sauce, rice vinegar, brown sugar, and sesame oil to the bowl.

Toss the noodles thoroughly until every strand looks glossy and evenly coated in sauce.

Taste and adjust with extra soy sauce or chili flakes if needed for stronger flavor.

Sprinkle fresh cilantro and additional green onions over the top before serving warm.