Cook spaghetti according to package directions. Reserve about 1 cup of pasta water before draining.

While the pasta is cooking, melt butter in a large skillet over medium heat.

Add minced garlic to the skillet and cook until fragrant, about 1 minute, being careful not to burn it.

Stir in soy sauce, oyster sauce, brown sugar, chili garlic sauce, and red pepper flakes. Cook for another minute until the sauce is well combined and slightly thickened.

Add the drained spaghetti to the skillet with the sauce. Toss to coat the noodles evenly.

If the noodles seem dry, add a splash of the reserved pasta water to loosen the sauce.

Stir in the grated Parmesan cheese and chopped fresh parsley. Toss until the cheese is melted and incorporated.

Serve immediately.