Preheat your oven to 350°F and lightly grease a 9x13-inch casserole dish with butter or cooking spray. While the oven reaches temperature, gather all ingredients so you're not scrambling mid-assembly—this setup prevents mistakes and keeps stress minimal.

Cook the egg noodles according to package directions, then drain and set aside. Avoid overcooking the noodles because they'll continue softening in the oven and turn mushy if you're not careful with timing precision.

In a large mixing bowl, combine cream of mushroom soup, turkey broth, and milk until smooth. Stir in garlic powder, onion powder, salt, and black pepper, whisking until spices distribute evenly throughout the creamy base.

Add the shredded turkey, cooked noodles, frozen mixed vegetables, and cheddar cheese to the soup mixture. Gently fold everything together until every ingredient receives coating from the creamy sauce—this thanksgiving leftover turkey casserole family recipe depends on even distribution so no bites taste incomplete.

Pour the turkey mixture into your prepared casserole dish, spreading it level with a spatula or wooden spoon. In a small bowl, mix breadcrumbs with melted butter and fresh parsley, then sprinkle this golden mixture evenly across the casserole top.

Bake uncovered for 35 minutes, or until the filling bubbles at the edges and the breadcrumb topping turns golden brown. The casserole is done when a fork inserted into the center meets creamy resistance rather than soupy liquid.

Remove from the oven and let it rest for 5 minutes before serving. This resting period allows the filling to set slightly so it holds together when you scoop portions onto plates.