Trisha Yearwood’s Spinach Casserole is a creamy, cheesy Southern classic perfect for holiday dinners, potlucks, or comforting weeknight meals. Made with frozen spinach, sour cream, cream of mushroom soup, shredded cheddar cheese, and topped with a buttery cracker crust, this casserole is simple to prepare with pantry staples and bakes to a bubbly, golden perfection.