This oven baked 4-ingredient chicken tetrazzini is the kind of practical, comforting casserole that earned a permanent place in mid-century home kitchens. Built from a short list of pantry-friendly ingredients, it turns cooked chicken, spaghetti, condensed soup, and Parmesan into a creamy, bubbling bake with a crisp golden top. It is easy to see why a 1962 recipe card like this one would have been pulled out for regular gatherings: it feeds a group, holds well on the table, and tastes like pure comfort.
Serve this casserole with a simple green salad dressed with vinaigrette, steamed green beans, or buttered peas to balance its richness. Warm rolls or toasted garlic bread fit right in if you want to lean into the supper-club feel, and for drinks, iced tea or a crisp white wine make easy companions.
Oven Baked 4-Ingredient Chicken Tetrazzini
Servings: 6 to 8
Ingredients
8 ounces spaghetti, broken in half
2 cups cooked chicken, chopped or shredded
2 cans (10.5 ounces each) condensed cream of mushroom soup
1 cup grated Parmesan cheese, divided
Directions
1. Heat the oven to 350°F and lightly grease a 9-by-13-inch baking dish or similar rectangular casserole.
2. Bring a large pot of salted water to a boil and cook the spaghetti until just tender. Drain well.
3. In a large bowl, combine the cooked chicken, condensed cream of mushroom soup, and 3/4 cup of the Parmesan cheese. Add the hot drained spaghetti and toss until everything is evenly coated.
4. Spread the mixture into the prepared baking dish and sprinkle the remaining 1/4 cup Parmesan evenly over the top.
5. Bake for 30 to 35 minutes, until hot and bubbling around the edges and lightly golden on top. Let stand 5 to 10 minutes before serving.
Variations & Tips
Make it creamier: If you like a looser, saucier casserole, stir in 1/2 cup milk or chicken broth with the soup before mixing everything together. That small adjustment helps the noodles stay especially tender as they bake.
Add a crunchy top: For a more pronounced crust, scatter a few spoonfuls of buttered bread crumbs over the Parmesan before baking. It is not part of the original four-ingredient spirit, but it gives the casserole a very nice contrast in texture.
Use rotisserie chicken: This is one of the easiest ways to get dinner on the table quickly. Both white and dark meat work well, and the seasoning on a plain rotisserie chicken usually blends right into the casserole.
Don’t overcook the pasta: Since the spaghetti continues to soften in the oven, boil it only to just tender. Starting with pasta that is too soft can leave the finished casserole heavy instead of pleasantly creamy.