Bring a large pot of water to a boil. Add noodles and cook according to package directions. Drain and set aside.
In a large bowl, whisk together chili crisp, soy sauce, rice vinegar, brown sugar, and sesame oil. Stir in scallion whites and garlic.
Toss the cooked noodles with the sauce until well coated.
Divide noodles among bowls, garnish with scallion greens, and serve warm.