Ina Garten Creamed Spinach is made with frozen chopped spinach, heavy cream, unsalted butter, yellow onions, flour, nutmeg, milk, Parmesan cheese, kosher salt, freshly ground black pepper, and Gruyere cheese. This easy Creamed Spinach recipe creates a creamy and healthy side dish that takes about 1 hour and 35 minutes to prepare and can serve up to 8 people.