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 French Onion Casserole?

You need 9 ingredients. The key ingredients include: 3 medium size sweet onions, 2 Tbsp. butter or margarine, 1 (8 oz.) pkg. fresh mushrooms, sliced, 2 c. shredded Swiss cheese, divided, and more.

Is French Onion Casserole suitable as general?

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

How do I store leftover French Onion Casserole?

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

French Onion Casserole Recipe

Name: French Onion Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 3 medium size sweet onions; 2 Tbsp. butter or margarine; 1 (8 oz.) pkg. fresh mushrooms, sliced; 2 c. shredded Swiss cheese, divided; 1 (10 3/4 oz.) can condensed cream of mushroom soup (undiluted); 1 (5 oz.) can evaporated milk; 2 tsp. soy sauce; 6 (1/2-inch thick) slices French bread; 1/4 c. finely chopped parsley

Try this homemade French Onion Casserole recipe the whole family will love. Made with sweet onions, butter, fresh mushrooms and Swiss cheese. Easy step-…

This French Onion Casserole relies on simple, everyday ingredients such as medium size sweet onions, butter or margarine, (5 oz.) can evaporated milk and soy sauce. It comes together quickly and makes 4 servings, at about 590 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

3 medium size sweet onions
2 Tbsp. butter or margarine
1 (8 oz.) pkg. fresh mushrooms, sliced
2 c. shredded Swiss cheese, divided
1 (10 3/4 oz.) can condensed cream of mushroom soup (undiluted)
1 (5 oz.) can evaporated milk
2 tsp. soy sauce
6 (1/2-inch thick) slices French bread
1/4 c. finely chopped parsley

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Quick Info

Servings
4 servings
Calories
590 kcal
Category
General

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