Chicken and stuffing casserole layers tender chicken with savory herb stuffing and a creamy sauce for a cozy family dinner. This high protein comfort food captures holiday flavors any night of the week.
Preheat your oven to 375°F. Butter a 9x13-inch baking dish for even cooking and easy cleanup.
In a large skillet over medium heat, melt the butter. Sauté the diced celery and chopped onion for 5–6 minutes until softened but not browned.
Mix the stuffing mix, sautéed vegetables, chicken broth, sage, and thyme in a large bowl. Toss gently until the stuffing is evenly moistened.
Arrange the chicken breasts in a single layer in the prepared baking dish. Season both sides with salt and pepper. Spread the cream of chicken soup evenly over the chicken.
Top with the stuffing mixture, covering the chicken completely. Press lightly to compact, but don’t flatten. Bake uncovered for 35–40 minutes, until the stuffing begins to turn golden brown and the chicken reaches 165°F.
Let the casserole rest 10 minutes out of the oven to allow juices to settle, then serve hot.