Grandma's 1962 Chicken Tetrazzini: A Timeless Casserole That Still Steals the Show

Grandma's 1962 Chicken Tetrazzini: A Timeless Casserole That Still Steals the Show

Some recipes are so good they transcend decades. This creamy, golden-topped Chicken Tetrazzini is exactly that kind of dish — the sort that gets handwritten on an index card, tucked into a recipe box, and passed down like a family heirloom. Dating back to 1962, this old-fashioned casserole layers tender shredded chicken, earthy mushrooms, and spaghetti in a rich, velvety sauce, all finished with a buttery breadcrumb crust that bakes up perfectly golden brown.

It is the definition of Sunday dinner comfort food. One bite and you will understand why someone went back for thirds — and then probably a fourth helping when no one was watching. Let's bring this vintage treasure back to life in your kitchen today.

Ingredients

• 12 ounces spaghetti, cooked and drained
• 3 cups cooked chicken, shredded (rotisserie works beautifully)
• 2 cups sliced mushrooms
• 4 tablespoons unsalted butter
• 1 medium yellow onion, finely diced
• 3 cloves garlic, minced
• 1/4 cup all-purpose flour
• 2 cups chicken broth
• 1 cup whole milk
• 1 cup sour cream
• 1 cup shredded Parmesan cheese, divided
• 1 cup shredded mozzarella cheese
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1/4 teaspoon garlic powder
• 1/4 teaspoon onion powder
• 1/2 cup seasoned breadcrumbs
• 2 tablespoons butter, melted (for topping)

Method

1. Preheat your oven to 375 degrees Fahrenheit. Lightly grease a 9x13-inch glass baking dish and set aside.
2. In a large skillet over medium heat, melt the 4 tablespoons of butter. Add the diced onion and cook for about 4 minutes until softened and translucent.
3. Add the garlic and sliced mushrooms to the skillet. Cook for another 5 to 6 minutes, stirring occasionally, until the mushrooms are tender and any liquid has evaporated.
4. Sprinkle the flour over the mushroom mixture and stir constantly for about 1 minute to cook out the raw flour taste.
5. Slowly pour in the chicken broth while stirring, followed by the milk. Continue stirring over medium heat until the sauce thickens and becomes smooth, about 4 to 5 minutes.
6. Remove the skillet from heat and stir in the sour cream, mozzarella, and half of the Parmesan cheese. Season with salt, pepper, garlic powder, and onion powder.
7. Add the shredded chicken and cooked spaghetti to the sauce. Toss everything together until the pasta and chicken are evenly coated.
8. Transfer the mixture into the prepared baking dish and spread it out evenly.
9. In a small bowl, combine the breadcrumbs, remaining Parmesan cheese, and melted butter. Sprinkle this mixture evenly over the top of the casserole.
10. Bake uncovered for 30 to 35 minutes, or until the top is deeply golden brown and the casserole is bubbling around the edges.
11. Remove from the oven and let it rest for 5 minutes before serving. Scoop generous portions and enjoy every creamy, cheesy, crispy-topped bite.

Tips for Making It Just Right

Do not overcook the spaghetti before baking. Pull it from the boiling water just a minute or two early — slightly al dente — because it will continue to cook in the oven and absorb the creamy sauce. Overcooked pasta will turn mushy in the casserole.

If you want an even richer, more indulgent sauce, substitute half-and-half for the whole milk. The original 1962 version likely used full-fat everything, and that is a big part of why it tastes so incredibly satisfying.

Make It Ahead and Storage

This casserole is a dream for meal planning. Assemble it completely, cover tightly with foil, and refrigerate for up to 24 hours before baking. When ready to cook, let it sit at room temperature for 20 minutes, then bake as directed, adding about 10 extra minutes to the bake time.

Leftovers keep well in an airtight container in the refrigerator for up to four days. Reheat individual portions in the microwave with a splash of broth or milk to keep the sauce creamy and prevent it from drying out.

Why This Recipe Has Lasted Over 60 Years

There is a reason Chicken Tetrazzini showed up in recipe boxes across America throughout the mid-twentieth century. It is affordable, filling, feeds a crowd, and tastes like something you could only get at a proper sit-down dinner. It turns simple pantry staples into something that feels genuinely special. Recipes like this one remind us that the best cooking has never been about complexity — it has always been about warmth, care, and feeding the people you love well.