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Easy Chicken Tetrazzini Bake

Easy Chicken Tetrazzini Bake

Creamy chicken tetrazzini baked until bubbly with mushrooms, peas, and a golden, cheesy breadcrumb topping. Cozy, crowd-pleasing comfort food made simple.
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Prep Time: 25 minutes
Cook Time: 30 minutes
Total Time: 55 minutes
Servings: 8

Ingredients
 

Main Ingredients

  • 12 oz spaghetti, broken in half
  • 2 tbsp olive oil
  • 8 oz sliced cremini mushrooms
  • 1 cup chopped yellow onion
  • 1.5 tsp minced garlic
  • 5 tbsp unsalted butter
  • 0.33 cup all-purpose flour
  • 2 cup low-sodium chicken broth
  • 1.25 cup half-and-half
  • 2 tbsp dry sherry optional
  • 0.5 cup sour cream
  • 1.25 tsp kosher salt
  • 0.75 tsp black pepper
  • 0.5 tsp dried thyme
  • 3 cup cooked chicken, chopped or shredded
  • 1 cup frozen peas
  • 1 cup shredded mozzarella cheese
  • 1 cup grated Parmesan cheese divided
  • 0.5 cup panko breadcrumbs
  • 2 tbsp chopped fresh parsley

Instructions

Preparation Steps

  • Heat oven to 375°F and grease a 9x13-inch baking dish.
  • Boil spaghetti in salted water until just shy of al dente; drain well.
  • Warm 1 tbsp olive oil in a large skillet. Sauté mushrooms and onion until browned and tender, 6–8 minutes.
  • Stir in garlic and cook 30 seconds. Transfer the vegetables to a bowl.
  • Melt butter in the same skillet. Whisk in flour and cook, whisking, 1–2 minutes.
  • Slowly whisk in chicken broth, then half-and-half and sherry. Simmer, whisking, until thick and creamy, 3–5 minutes.
  • Remove from heat. Stir in sour cream, salt, pepper, thyme, 3/4 cup Parmesan, and half the mozzarella.
  • Fold in chicken, peas, and the sautéed vegetables. Add cooked spaghetti and toss to coat evenly.
  • Spread into the baking dish. Mix breadcrumbs with remaining 1 tbsp olive oil; sprinkle over top with remaining cheeses.
  • Bake 20–25 minutes until bubbling and golden. Rest 5 minutes, then garnish with parsley and serve.

Notes

Swap turkey for the chicken after the holidays, or add a pinch of red pepper flakes for gentle heat. To make ahead, assemble, cover, and refrigerate up to 24 hours; bake 30–35 minutes. Leftovers reheat well with a splash of broth or milk.
This recipe is an original creation inspired by classic Easy Chicken Tetrazzini Bake flavors. All ingredient ratios and instructions are independently developed.