Oo-la-la Onion Casserole

Tam D


This simple yet elegant dish will fill your home with its tantalizing aroma! It's fantastically rich and delicious, and could easily be served as a main dish or as a side or course in a special occasion meal. It's as decadent as any upper crust restaurant -- you will not be disappointed!

★★★★★ 1 vote
40 Min
45 Min


Add to Grocery List

3 Tbsp
3 large
sweet onions, sliced thin
2 c
shredded swiss cheese
10 oz
can cream of mushroom soup
2/3 c
whole milk or rich milk substitute
1 tsp
soy sauce
2 tsp
beef base, or good quality bouillon cubes
1/4 tsp
white pepper
8 slice
french-style bread, cut 1/2-3/4"

How to Make Oo-la-la Onion Casserole


  • 1In a large 3 qt. saucepan, saute' onion slices in melted butter over med-low heat, until they're golden yellow, but not browned.
    Note: This step takes time -- 20-30 min. Stir the onion often. Watch carefully the last few minutes to prevent scorching.
  • 2Meanwhile, with food release spray, prepare 4-8 single-serving baking dishes (such as oven-safe soup bowls, ramekins, oval casserole or au gratin dishes); use four for meal-size servings, or eight dishes for appetizer and sides.
  • 3In a small saucepan, stir together the soup, beef base, milk, soy sauce, and pepper until warm and blended. Turn off heat and let set until onions are ready.
  • 4Divide the onions evenly into your baking dishes.
  • 5Layer 2/3 of the shredded Swiss cheese over the cooked onion.
  • 6Pour the soup mixture over the cheese layer, and stir gently to combine.
  • 7Cover the tops with a slice/s of french-style bread.
  • 8Bake, uncovered, at 350* for 10-15 min, til heated through.
  • 9Remove from oven. Push bread slices into the onion and soup mixture. Top with remaining cheese, and return to oven for an additional 10-15 min, or until lightly browned and bubbly.
  • 10Turn off the oven and allow the casserole to rest in the oven for 10-15 min more.
    Remove from oven and serve immediately, with a light green salad, and a glass of favorite wine.
  • 11NOTE: 1) My family is gluten intolerant so I used slices of GF french-style bread, which worked perfectly.
    2) You could bake this in a 3 qt. casserole dish, but it's not as pretty when you serve it. If you're going to use the large casserole dish I recommend breaking the bread into chunks, to make serving easier.

Printable Recipe Card

About Oo-la-la Onion Casserole

Main Ingredient: Vegetable
Regional Style: French
Dietary Needs: Vegetarian
Other Tag: Quick & Easy

Show 4 Comments & Reviews

15 Homemade Coleslaw Recipes

15 Homemade Coleslaw Recipes

Kitchen Crew @JustaPinch

Tangy? Creamy? Original? Unique? Whichever type of coleslaw you prefer, we have a recipe for you! We guarantee you’ll find a recipe that’s perfect for a summer dinner side or...

24 Recipes On A Stick That Are Delish

24 Recipes on a Stick that are Delish

Kitchen Crew @JustaPinch

How do you make a recipe better? You put it on a stick. Duh.

Let's Talk Turkey! Recipe

Let's Talk Turkey!

Kitchen Crew

The star of Thanksgiving dinner can be finicky to make and a tad daunting. There's nothing worse than serving guests a dry turkey. Prepare one of these mouthwatering recipes and...