01 - Cook spaghetti noodles in a large pot of salted boiling water until al dente, about 8 minutes. Drain and set aside.
02 - In a large skillet over medium-high heat, melt 2 tablespoons of butter. Add shrimp, season with salt and black pepper, and sauté for 2–3 minutes, turning once, until pink and opaque. Transfer shrimp to a plate.
03 - Reduce heat to medium. Add remaining butter to the skillet. Stir in minced garlic and cook for 1 minute until fragrant.
04 - Return shrimp to skillet and add cooked pasta. Toss with garlic butter until evenly coated. Sprinkle with grated Parmesan cheese and chopped parsley.
05 - Transfer pasta to plates. Garnish with additional parsley and Parmesan if desired. Serve immediately.