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 & Rutabage Gratin ?

You need 12 ingredients. The key ingredients include: 4 Tbs unsalted butter, 2 tbs olive oil, 4 cloves garlic, finely chopped, 1 med red onion, thinly sliced, roughly chop slices into quarters or eighths, and more.

Is Potato & Rutabage Gratin suitable as general?

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

How do I store leftover Potato & Rutabage Gratin ?

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

Potato & Rutabage Gratin Recipe

Name: Potato & Rutabage Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 4 Tbs unsalted butter; 2 tbs olive oil; 4 cloves garlic, finely chopped; 1 med red onion, thinly sliced, roughly chop slices into quarters or eighths; 1/4 cup flour; 2 cups milk; 1 cup heavy cream; 1 1/2 lb russet potatoes, peeled & sliced thin; 1 lb rutabaga, peeled & sliced thin; 1 tbs rosemary leaves; 2 cups (4 oz) grated Gruyere cheese; salt & pepper

Try this homemade Potato & Rutabage Gratin recipe the whole family will love. Made with butter, olive oil, garlic and red onion. Easy step-by-step instr…

This Potato & Rutabage Gratin relies on simple, everyday ingredients such as tbs unsalted butter, tbs olive oil, garlic, finely chopped and flour. It comes together quickly and makes 4 servings, at about 1872 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

1872

kcal

Calories

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.
A good 1:1 gluten-free flour blend works well if you need a gluten-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.

My Personal Notes

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Potato & Rutabage Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions