Bring a large pot of lightly salted water to a boil. Cook the noodles until al dente according to the package instructions. Set aside about ¼ cup of pasta water.
In a small saucepan, bring the garlic and oil to a boil over medium heat. Cook for about 2-3 minutes or until the garlic is lightly browned.Turn off the heat. Remove from heat and pour into a heat-proof bowl. The garlic will continue to cook.
In a cold saute pan, add butter, red chili pepper flakes, and garlic. Turn on the heat and set it to medium-high heat, cook and keep stirring for about 2 minutes. Do not burn the garlic.
Add the soy sauce, oyster sauce, Worcestershire sauce, stir to combine, and until warm enough. Turn off the heat immediately.
Add the cooked pasta and sesame oil into the skillet, stir to combine. Adjust seasoning with additional oyster sauce or soy sauce if needed.
Stir in the parmesan and add a small amount of pasta water if the pasta is too dry to your liking.
Serve the noodles with chopped green onion and the optional garlic oil (about 1-2 teaspoon or as needed). Enjoy!
Notes
You can keep the garlic oil for 1 week at room temperature.The nutrition facts below are for the garlic noodles only. The garlic oil isn't included.