Prepare the Scallions: Rinse the green onions under running water and slice them thinly, keeping the green and white parts separate.

Heat the Oil: In a large frying pan or wok, pour the scallion-infused oil and heat over medium heat for about 3 minutes until it shimmers.

Fry the Scallions: Add the sliced scallions to the hot oil, stirring gently for about 2 to 3 minutes until they turn golden brown and crispy.

Create the Sauce Base: In a medium bowl, combine the light soy sauce, dark soy sauce, and sugar and whisk until the sugar has dissolved.

Cook the Noodles: Bring a large pot of water to a boil, add the noodles, and cook according to package instructions (about 4 to 5 minutes).

Combine Everything: Return the drained noodles to the pot, pour in the prepared sauce, and toss gently with the crispy fried scallions.