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Makeover Spinach Gratin

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This easy makeover Spinach Gratin is creamy and decadent, with a hint of nutmeg baked in the oven topped with melted Gruyere cheese for a must at your Holiday table!

Spinach Gratin
Makeover Spinach Gratin

I bring this dish to my mom’s every year for Thanksgiving because everyone loves it! Much lighter than a traditional gratin and so easy to make! This is a must for the holidays but if you want to make this for a smaller gathering, you can easily make half of the recipe. More gratin recipes I love Brussels sprouts gratin,  Spiralized Turnip and Potato Au Gratin with Turkey or the classic Scalloped Potatoes Au Gratin.

Spinach with cream sauce and cheese

If you don’t know what a gratin is, it’s basically creamed spinach topped with cheese and baked in the oven.


  • I used Gruyere here but Swiss or Mozzarella would work.
  • You can also skip the melted cheese on top and serve it as a simple creamed spinach instead.
  • Make this gluten-free using an all purpose gluten-free flour mix, such as Cup4cup.

How To Make Spinach Gratin

Spinach GratinSpinach GratinSpinach Gratin

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Makeover Spinach Gratin

4.94 from 16 votes
Creamy spinach with a hint of nutmeg is baked in the oven topped with melted cheese for a decadent Holiday side dish.
Course: Side Dish
Cuisine: American
Spinach with cream sauce and cheese
Prep: 10 minutes
Cook: 40 minutes
Total: 50 minutes
Yield: 13 servings
Serving Size: 1 /2 cup


  • 3 tbsp whipped butter, I used Land O Lakes
  • 1 cup finely chopped onion
  • 1/4 cup flour, use Gluten free AP flour for GF
  • 1/4 tsp fresh grated nutmeg
  • 3 cups 2% milk
  • 3 lbs frozen chopped spinach, defrosted, I used 3 16-oz packages
  • 3/4 cup freshly grated Parmesan cheese
  • 1 tbsp kosher salt
  • 1/2 tsp freshly ground black pepper
  • 1/2 cup shredded Swiss or Gruyere cheese


  • Preheat the oven to 425F°.
  • In a heavy-bottomed saute pan melt the butter over medium heat. Add the onions and sauté until translucent, about 10 - 12 minutes.
    sauteed onions
  • Add the flour and nutmeg; cook 2 more minutes, stirring occasionally.
  • Add the milk and cook until thickened, about 5 - 7 minutes.
  • Squeeze as much liquid as possible from the spinach and add the spinach to the sauce.
  • Add 1/2 cup of the Parmesan cheese and mix well. Season to taste, with salt and pepper.
    Spinach in cream sauce
  • Transfer the spinach to a large baking dish and sprinkle the remaining 1/4 cup Parmesan and the Swiss cheese on top.  Bake for 20 minutes until hot and bubbly. Serve hot.
    Spinach with cheese

Last Step:

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Adapted from Ina Garten


Serving: 1 /2 cup, Calories: 111 kcal, Carbohydrates: 9.2 g, Protein: 7.7 g, Fat: 5.5 g, Saturated Fat: 2.5 g, Cholesterol: 17.5 mg, Sodium: 287 mg, Fiber: 2 g, Sugar: 2.6 g