How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Potato Spinach Gratin?

You need 11 ingredients. The key ingredients include: 3 shallots, thinly sliced, 1 tablespoon butter, 2 packages (10 ounces each) frozen chopped spinach, thawed and squeezed dry, 1 teaspoon salt, divided, and more.

Is Potato Spinach Gratin suitable as vegetarian?

Yes, Potato Spinach Gratin falls under the Vegetarian category and is a great choice for this type of meal.

How do I store leftover Potato Spinach Gratin?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Potato Spinach Gratin Recipe

Name: Potato Spinach Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 3 shallots, thinly sliced; 1 tablespoon butter; 2 packages (10 ounces each) frozen chopped spinach, thawed and squeezed dry; 1 teaspoon salt, divided; 1/2 teaspoon pepper, divided; 1/8 teaspoon ground nutmeg; 3 pounds medium potatoes (about 9 medium), peeled and thinly sliced; 1 cup shredded Gruyere or Swiss cheese; 1 tablespoon cornstarch; 1-1/2 cups 2% milk; 1 cup heavy whipping cream

Try this homemade Potato Spinach Gratin recipe the whole family will love. Made with shallots, butter, spinach and salt. Easy step-by-step instructions …

This Potato Spinach Gratin relies on simple, everyday ingredients such as shallots, thinly sliced, butter, salt, divided and pepper, divided. It comes together quickly and makes 4 servings, at about 659 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Vegetarian

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Coconut cream is a reliable plant-based alternative to dairy cream.

No specific allergen information. Please check the ingredient list for possible allergens.

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Potato Spinach Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

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