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 Creamed Onion Gratin?

You need 11 ingredients. The key ingredients include: 2 yellow onions, cored & quartered, 1/4 cup olive oil, 1/2 teaspoon salt, kosher and freshly ground black pepper, to taste, 2 tablespoons unsalted butter, and more.

Is Creamed Onion Gratin suitable as general?

Yes, Creamed Onion Gratin falls under the General category and is a great choice for this type of meal.

How do I store leftover Creamed Onion Gratin?

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

Creamed Onion Gratin Recipe

Name: Creamed Onion Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 yellow onions, cored & quartered; 1/4 cup olive oil; 1/2 teaspoon salt, kosher and freshly ground black pepper, to taste; 2 tablespoons unsalted butter; 2 tablespoons flour; 1 cup heavy cream; 1/4 cup dry white wine; 1/4 teaspoon nutmeg, freshly grated, to taste; 1/2 cup parmesan cheese, finely grated; 3 ounces gorgonzola, crumbled; 1/4 teaspoon paprika

Try this homemade Creamed Onion Gratin recipe the whole family will love. Made with yellow onions, olive oil, salt and unsalted butter. Easy step-by-ste…

This Creamed Onion Gratin relies on simple, everyday ingredients such as olive oil, unsalted butter, flour and heavy cream. It comes together quickly and makes 4 servings, at about 490 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

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.

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Creamed Onion Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

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