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 Baked Onions Au Gratin?

You need 7 ingredients. The key ingredients include: 6 -9 white onions or 6 -9 yellow onions, sliced 1/4-inch thick, 2 tablespoons butter, 1/2 cup heavy whipping cream, 1/4 cup dry white wine, and more.

Is Baked Onions Au Gratin suitable as general?

Yes, Baked Onions Au Gratin falls under the General category and is a great choice for this type of meal.

How do I store leftover Baked Onions Au Gratin?

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

Baked Onions Au Gratin Recipe

Name: Baked Onions Au Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 6 -9 white onions or 6 -9 yellow onions, sliced 1/4-inch thick; 2 tablespoons butter; 1/2 cup heavy whipping cream; 1/4 cup dry white wine; 1/8 teaspoon black pepper; 1/4 cup parmesan cheese, grated; 1 1/2 cups swiss cheese, shredded

Try this homemade Baked Onions Au Gratin recipe the whole family will love. Made with white onions, butter, heavy whipping cream and white wine. Easy st…

This Baked Onions Au Gratin relies on simple, everyday ingredients such as butter, heavy whipping cream, dry white wine and black pepper. It comes together quickly and makes 4 servings, at about 410 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

Servings: persons

6 -9 white onions or 6 -9 yellow onions, sliced 1/4-inch thick
2 tablespoons butter
1/2 cup heavy whipping cream
1/4 cup dry white wine
1/8 teaspoon black pepper
1/4 cup parmesan cheese, grated
1 1/2 cups swiss cheese, shredded

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Quick Info

Servings
4 servings
Calories
410 kcal
Category
General

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Baked Onions Au Gratin

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