Melt Butter & Sauté Garlic: In a saucepan over medium heat, melt butter. Add minced garlic and sauté for 30 seconds until fragrant.
Add Cream: Pour in heavy cream, whisking constantly. Bring to a gentle simmer (do not boil).
Incorporate Cheese: Gradually add Parmesan cheese, whisking until fully melted and smooth.
Season: Stir in salt, pepper, and nutmeg (if using). Reduce heat to low and simmer for 3–5 minutes until thickened.
Adjust Consistency: If too thick, add a splash of milk or pasta water. For extra richness, stir in 1 tbsp butter at the end.
Serve: Toss with cooked fettuccine, garnish with parsley, and enjoy!