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-Celeriac Gratin?

You need 10 ingredients. The key ingredients include: 4 large russet potatoes, peeled and sliced into 1cm thick slices, 1 large celeriac, peeled and sliced into 1cm thick slices (about 1 1/2 lbs), 1 large onion, thinly sliced, kosher salt or sea salt, and more.

Is Potato-Celeriac Gratin suitable as general?

Yes, Potato-Celeriac Gratin falls under the General category and is a great choice for this type of meal.

How do I store leftover Potato-Celeriac Gratin?

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

Potato-Celeriac Gratin Recipe

Name: Potato-Celeriac Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 4 large russet potatoes, peeled and sliced into 1cm thick slices; 1 large celeriac, peeled and sliced into 1cm thick slices (about 1 1/2 lbs); 1 large onion, thinly sliced; kosher salt or sea salt; ground black pepper; 2 garlic cloves, minced; ⅔ cup grated white cheddar cheese; 1 ½ cups whole milk; ½ cup full fat sour cream; 2 sprigs fresh rosemary

Try this homemade Potato-Celeriac Gratin recipe the whole family will love. Made with russet potatoes, celeriac, onion and kosher salt. Easy step-by-ste…

This Potato-Celeriac Gratin relies on simple, everyday ingredients such as large onion, thinly sliced, kosher salt or sea salt, ground black pepper and garlic cloves, minced. It comes together quickly and makes 4 servings, at about 354 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 General

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

Coconut cream is a reliable plant-based alternative to dairy cream.

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

My Personal Notes

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Potato-Celeriac Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions