Bring a large pot of salted water to a boil. Add the spaghetti and cook according to package instructions until al dente.

Reserve 1 cup of pasta water, then drain the pasta in a colander.

In a skillet, melt 1/4 cup of butter over medium heat. Add the minced garlic and sauté until fragrant, about 1-2 minutes.

Add the cooked pasta to the skillet along with the remaining butter, parsley, salt, and pepper. Toss to combine, adding reserved pasta water as needed to create a sauce.

Serve immediately, topped with grated parmesan cheese.