Preheat the oven to 350°F. Spray a 9x13-inch baking dish with cooking spray.
Add 5 cups diced cooked chicken to the bottom of the baking dish.
In a large bowl, stir together 2 (10.5 ounce) cans cream of chicken soup, 1 cup sour cream, 1/4 teaspoon black pepper, 1/4 teaspoon dried thyme, 1/4 teaspoon garlic powder, 1/4 teaspoon onion powder, and 1/4 teaspoon poultry seasoning.
Spread on top of the chicken evenly.
In a medium bowl, stir together 2 cups crushed Ritz crackers, 1/2 cup (1 stick) unsalted butter, melted and 1/2 Tablespoon poppy seeds.
Sprinkle the crumbs on top of the sauce.
Bake for 25-30 minutes, uncovered, until bubbly and the top is lightly browned. Serve immediately.
Notes
Please refer to my FAQ’s (Frequently Asked Questions) and ingredient list above for other substitutions or for the answers to the most common questions.