Can I use frozen spinach?
Yes. Use about 16 to 20 ounces frozen chopped spinach. Thaw it completely and squeeze it very dry. Excess water is the number one reason creamed spinach turns loose and sad. Squeeze until no liquid drips, then squeeze again for good luck.
How do I keep creamed spinach from getting watery?
Two moves: (1) cook off moisture from fresh spinach before adding cream, and (2) if using frozen, squeeze it until no liquid drips. Also, let the sauce simmer for a minute or two so it thickens before baking.
What makes this “rustic”?
We chop the spinach, but not into a paste. The sauce is thicker, clingy, and a little chunky from onion and Parmesan. It is cozy, not precious.
Can I make it ahead?
Absolutely. Make the spinach and sauce up to 2 days ahead, refrigerate, then top with breadcrumbs and bake right before serving. Heads up: the sauce will thicken in the fridge. If it is cold from the fridge, add 5 to 10 minutes to the bake time (and a splash of milk if it needs loosening).
What if I do not have nutmeg?
Skip it, or use a tiny pinch of ground white pepper. Nutmeg is classic in cream sauces, but the dish will still be great without it.
Can I swap the cream cheese?
Yes. Mascarpone works great, and Boursin is also excellent if you want extra garlic and herbs. If you skip it entirely, add a little more Parmesan and simmer the sauce an extra minute so it tightens up.
Any allergy friendly tips?
This recipe contains dairy and gluten. For a gluten-free version, use gluten-free breadcrumbs and swap the flour for a 1:1 gluten-free blend.