Chicken Tetrazzini is the kind of baked pasta casserole that makes the whole kitchen smell like comfort food the moment it hits the oven. It is creamy, cheesy, loaded with tender chicken and earthy mushrooms, and it feeds a hungry family of six from one pan. I have made this recipe more times than I can count, and it never once disappoints.
The first time I put this together on a weeknight, I was not sure my family would go for the white wine in the sauce. They cleaned the pan. The sauce is rich but not heavy, the pasta stays tender without going mushy, and that golden cheese crust on top is the part everyone fights over. This is about to become your new favorite.
Table of Contents
Ingredients for Chicken Tetrazzini
I love how this chicken tetrazzini recipe relies on simple grocery store staples but still delivers something that tastes genuinely special. The one thing that makes a real difference is making sure your dairy is at room temperature before you start the sauce. Here is everything you need:
- 12 oz dry spaghetti noodles (broken in half)
- 4 tbsp unsalted butter (divided) — I recommend unsalted so you stay in full control of the seasoning throughout
- 8 oz cremini mushrooms (sliced) — My preference is cremini over white button mushrooms for a deeper, earthier flavor that comes through in every bite
- Kosher salt (to taste)
- Ground black pepper (to taste)
- ½ cup onion (diced)
- 2 cloves garlic (minced)
- ½ cup all-purpose flour
- 2½ cups whole milk (room temperature) — In my experience, cold milk straight from the fridge causes lumps in the roux, so pull it out 30 minutes early
- 1 cup sour cream (room temperature)
- 1½ cups low-sodium chicken broth
- ¾ cup dry white wine
- 2 cups Colby Jack cheese (shredded, divided)
- 1 tsp fresh thyme leaves
- 4 cups shredded cooked chicken — Pro tip: a store-bought rotisserie chicken shreds perfectly here and saves significant prep time
Step-by-Step Instructions
I recommend reading all the steps once before you start, since the pasta and sauce run at the same time. That small bit of preparation makes this chicken tetrazzini come together smoothly without any stressful scrambling.
Step 1: Preheat the oven to 400°F. Bring a large pot of generously salted water to a boil and cook the spaghetti to al dente according to package directions. Drain and set aside. Do not rinse the pasta — the surface starch helps the sauce cling to every strand.
Step 2: In a large saucepan, melt 2 tablespoons of butter over medium-high heat. Add the sliced mushrooms, season with salt and pepper, and cook, stirring frequently, for about 4 minutes until they release their liquid and start to brown at the edges. Do not crowd the pan or they will steam instead of sear and you lose all that flavor.
Step 3: Add the diced onion and minced garlic to the mushrooms. Cook for 4 to 5 minutes, stirring occasionally, until the onion is tender and turning lightly golden.
Step 4: Reduce the heat to medium. Add the remaining 2 tablespoons of butter, then sprinkle the flour over the vegetables and stir constantly for 30 seconds to cook out the raw flour taste. This step matters — rushing it leaves a chalky flavor in the sauce.
Step 5: Pour in the milk slowly and stir until the flour is fully dissolved and no lumps remain. Then add the sour cream, chicken broth, and white wine, stirring constantly. Bring to a gentle boil, then reduce to a simmer and cook until the sauce begins to thicken noticeably. Remove from heat.
Step 6: Stir in 1¼ cups of the shredded Colby Jack and the fresh thyme. Season with salt and pepper to taste. Add the shredded chicken and cooked pasta and toss well until everything is evenly coated.
Step 7: Transfer the mixture to a greased 9×13-inch baking dish. Sprinkle the remaining ¾ cup of cheese evenly over the top. Bake for 25 to 30 minutes until golden and bubbling at the edges. Let it rest for 10 minutes before serving — this step helps the sauce set up so it is not soupy when you scoop it out.
What Goes Well with Chicken Tetrazzini
Chicken tetrazzini is a rich, filling main dish, so the sides that work best are ones that bring freshness, crunch, or something light to balance all that creamy goodness.
Simple Green Salad: A crisp salad with a bright vinaigrette cuts right through the richness of the sauce and refreshes the palate between bites. This is the pairing I reach for every single time I serve this casserole.
Homemade Cheesy Breadsticks: Warm, pull-apart cheesy breadsticks are the perfect companion for scooping up every last bit of creamy sauce left in the baking dish.
Easy Vegetable Soup: A light, broth-based vegetable soup as a starter balances the heaviness of the casserole and rounds out the meal with extra vegetables without competing with the main dish.
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Garlic Roasted Vegetables: Oven-roasted vegetables bring a slightly caramelized sweetness and a nice textural contrast to the soft, creamy pasta.
Broccoli and Mushroom Stir Fry: A quick stir fry with broccoli and mushrooms echoes the earthy flavors already in the casserole and adds a fresh, bright element to the plate.
Chicken Marsala: If you are planning a full comfort food dinner spread for guests or a special occasion, this saucy chicken marsala makes a stunning second dish alongside the tetrazzini.
French Onion Chicken Orzo Casserole: For a cozy potluck or holiday table, this French onion chicken orzo casserole pairs beautifully as a complementary baked dish that the whole table will love.
Storage and Reheating Tips
Store leftover chicken tetrazzini covered tightly in the baking dish or transferred to an airtight container in the refrigerator for up to 4 days. The pasta absorbs more sauce as it sits overnight, which actually makes the leftovers even more flavorful the next day.
To reheat, I recommend adding a splash of chicken broth or milk over the portion before covering with foil and warming in a 350°F oven for about 15 minutes. This restores the creamy texture without drying it out. Individual portions can also be microwaved on medium power in 60-second intervals, stirring between each round.
Pro tip: Chicken tetrazzini freezes well unbaked. Assemble the full casserole, cover tightly with plastic wrap and then foil, and freeze for up to 3 months. Thaw overnight in the refrigerator before baking as directed, adding an extra 5 to 10 minutes to the bake time.
Frequently Asked Questions
Can I make chicken tetrazzini without wine?
Yes. Simply swap the dry white wine for an equal amount of additional low-sodium chicken broth. The sauce will taste slightly less complex but still rich and delicious.
Can I use a different pasta shape?
Spaghetti is the classic choice, but linguine, fettuccine, or penne all work well. Cook any shape to al dente and break longer noodles in half so they fit easily in the baking dish and every portion gets an even mix.
Can I assemble this ahead of time?
Absolutely. Build the full casserole, cover tightly, and refrigerate for up to 24 hours before baking. Go straight from the fridge to the oven and add 5 to 10 extra minutes to the bake time to account for the cold start.
Easy Chicken Tetrazzini
Ingredients
Equipment
Method
- Preheat the oven to 400°F. Bring a large pot of generously salted water to a boil and cook the spaghetti to al dente according to package directions. Drain and set aside. Do not rinse the pasta.
- In a large saucepan, melt 2 tablespoons of butter over medium-high heat. Add the sliced mushrooms, season with salt and pepper, and cook stirring frequently for about 4 minutes until browned. Do not crowd the pan.
- Add the diced onion and minced garlic. Cook for 4 to 5 minutes, stirring occasionally, until the onion is tender and lightly golden.
- Reduce heat to medium. Add the remaining 2 tablespoons of butter, sprinkle the flour over the vegetables, and stir constantly for 30 seconds to cook out the raw flour taste.
- Pour in the milk slowly and stir until fully dissolved with no lumps. Add the sour cream, chicken broth, and white wine, stirring constantly. Bring to a gentle boil then reduce to a simmer and cook until the sauce begins to thicken. Remove from heat.
- Stir in 1 and one quarter cups of the shredded Colby Jack and the fresh thyme. Season with salt and pepper to taste. Add the shredded chicken and cooked pasta and toss well to combine.
- Transfer the mixture to a greased 9×13-inch baking dish. Sprinkle the remaining three quarters cup of cheese evenly over the top. Bake for 25 to 30 minutes until golden and bubbling at the edges. Let rest for 10 minutes before serving.
