Can I use fresh spinach instead of frozen?

Yes, you can substitute fresh spinach for frozen. Make sure to fully cook your spinach and squeeze out any moisture before using it to make this keto spinach recipe.

Can I prepare this in advance?

Absolutely! You can assemble the casserole ahead of time and refrigerate it until you're ready to bake. Just add a few extra minutes to the baking time if the dish is cold from the fridge.

What can I serve with this casserole?

This gratin pairs well with a side salad, grilled chicken, or roasted vegetables for a complete keto-friendly meal.

Can I freeze leftovers?

Yes, you can freeze any leftovers in an airtight container. Reheat in the oven or microwave when ready to enjoy.

Is this casserole suitable for vegetarians?

Yes, this recipe is vegetarian-friendly, and it's a great option for those looking to incorporate more low-carb, veggie-packed meals into their diet.

What kind of cheese can I use for this keto casserole?

You can use any type of melting cheese for this keto spinach cheese casserole, including cheddar, swiss or mozzarella.

The BEST Keto Spinach Gratin Casserole

Ingredients

Units Scale

2 tablespoons unsalted butter
2 cups chopped yellow onions (1 large)
1/4 teaspoon grated nutmeg
1 cup heavy cream
1/2 cup almond milk
2 oz cup cream cheese
4-10-ounce frozen spinach, thawed
1 cup freshly grated Parmesan cheese
Salt and pepper to taste
1/2 cup grated Gruyere cheese

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Instructions

Preheat the oven to 425 degrees F.
Melt the butter in a heavy-bottomed saute pan over medium heat. Add the onions and saute until translucent, about 15 minutes.
Add the cream cheese and nutmeg and cook, stirring, for 2 more minutes. Add the cream and milk and cook for 2 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.
Transfer the spinach to a baking dish and sprinkle the remaining 1/2 cup Parmesan and the Gruyere on top. Bake for 15-20 minutes until hot and bubbly. Serve hot

Notes

Feel free to use any type of melting cheese
I will sometimes stir the keto spinach gratin casserole (you will notice this in the pictures) before serving.

Author: Cat
Prep Time: 15 minutes
Cook Time: 15 minutes
Category: Sides
Method: Baking
Cuisine: American, Fall, Holidays, Winter
Diet: Gluten Free

Nutrition

Serving Size: 1/8 th
Calories: 267
Sugar: 2.9
Fat: 21
Carbohydrates: 9.5
Fiber: 4.5
Protein: 13