In a saucepan melt the butter and lightly saute the minced garlic in the butter for 1-2 minutes.
Next, stir in the heavy whipping cream and Italian seasoning. Stir so everything gets warm and well combined.
Then stir in the Parmesan cheese. Continue to stir until the cheese melts and the mixture becomes a sauce.
Taste and season with salt and pepper to your liking.
Notes
If you notice small lumps in the sauce it likely means your cheese hasn't fully melted or may need more stirring. Try whisking the sauce to remove any final lumps. While some like to thicken sauce with cornstarch I will sometimes add a tablespoon or two of plain greek yogurt to this recipe. But it’s not necessary, just an option.This recipe will make around 1 cup of sauce which I think works well for two servings of pasta but you could easily toss 1-2 more servings of pasta in this amount. It just depends how saucy you like your fettuccine Alfredo.