Alfredo Sauce with Cream Cheese

½ cup salted butter

3 ounces cream cheese

½ teaspoon minced garlic

2 cups (1 pint) heavy whipping cream , or half-and-half

½ teaspoon garlic powder , more to taste

¼ teaspoon Italian seasoning , optional

Kosher salt , to taste

Freshly ground black pepper , to taste

¼ -3/4 cup freshly grated parmesan cheese , more to taste

1 pound fettuccine , cooked according to package

Optional: Grilled chicken, Steamed broccoli