Easy French Onion Chicken Casserole
If you love creamy, cozy casseroles that come together fast, this Easy French Onion Chicken Casserole is about to be your new go-to. Made with tender rotisserie chicken, wide egg noodles, French onion flavor, and a rich, creamy sauce, this dish is the ultimate comfort food with minimal effort.
It has everything people love about a classic casserole — creamy texture, savory flavor, melty cheese, and that crispy French fried onion topping — all baked into one easy dish. It’s perfect for busy weeknights, meal prep, or when you need something simple that still feels homemade and satisfying.
If you loved my tuna casserole, this is the next-level version… same ease, but even more flavor.
🤔 Common Questions
Yes! Assemble everything (without the topping), cover, and refrigerate up to 24 hours. Add the onions and bake when ready.
You can replace it with extra sour cream or Greek yogurt, but mayo gives it that rich, classic casserole texture.
Wide egg noodles are best because they hold the creamy sauce well and don’t fall apart.
Before You Cook
This is one of those recipes where simple ingredients do all the work, so a few small tips make a big difference:
- Salt your pasta water well — it’s your first layer of flavor
- Don’t overcook the noodles — keep them al dente so they don’t get mushy in the oven
- Use freshly shredded cheese (you already do 👏) — it melts better and gives that creamy texture
- Slice your chicken into even bite-sized pieces so every bite is balanced
- If you want it extra cozy, let it sit 5–10 minutes after baking so it thickens perfectly
Easy French Onion Chicken Casserole
Ingredients
- 1 rotisserie chicken chopped (about 3 cups)
- 1 can Campbell’s Cream of Chicken Soup with Herbs
- 1 packet Lipton Onion Soup Mix
- 4 oz colby jack cheese freshly shredded
- 8 oz sour cream
- ¾ cup mayonnaise
- 12 oz wide egg noodles cooked al dente
- 8 slices thinly sliced provolone deli-style
- 2 tbsp melted butter
- 1 cup French fried onions
Instructions
- Preheat oven to 350°F
- Boil egg noodles in salted water until al dente, then drain
- Chop rotisserie chicken into bite-sized cubes
In a large bowl, mix together:
- Chicken
- Mayo
- Sour cream
- Lipton onion soup mix
- Colby jack cheese
- Cooked noodles
- Cream of chicken soup
Transfer mixture to a baking dish
- Lay provolone slices evenly over the top
- Mix melted butter with French fried onions and sprinkle over cheese
- Bake for 30 minutes, until hot, bubbly, and golden on top
Video
👝 How to Store Leftovers
Store in an airtight container for 3-5 days.
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Can I sub chicken thighs?
Absolutely! You can bake them first , and chop em up and add them right in!
Your chicken tetrazzini is one of our family favorites! I’ve made it 3 times! I have shared that recipe to my daughters and a few of my cousins! It’s so easy and delicious.
Thank youuuuu ❤️❤️❤️❤️ so happy you enjoyed!!!
My store was out of chicken and herb soup. Can I use regular cream of chicken soup instead?
Absolutely! Grab it, substitute it, & you don’t have to change anything in recipe to accommodate!