Homestyle Chicken and Rice Casserole (Easy Weeknight Classic)

A cozy, family-friendly casserole: tender chicken, fluffy rice, and a creamy, savory sauce baked until golden. Easy to assemble and forgiving — great for weeknight dinners or leftovers.

Yield

Serves 4–6

Time

• Prep: 15 minutes
• Cook: 45–55 minutes
• Total: 1 hour–1 hour 10 minutes

Ingredients

• 2 tablespoons olive oil or unsalted butter
• 1 medium yellow onion, finely chopped (about 1 cup / 150 g)
• 2 medium carrots, diced (about 1 cup / 120 g)
• 2 celery stalks, diced (about 1 cup / 100 g)
• 3 cloves garlic, minced
• 1 teaspoon kosher salt, plus more to taste
• ½ teaspoon freshly ground black pepper
• 1 teaspoon dried thyme (or 1 tablespoon fresh, chopped)
• 1 cup long-grain white rice, rinsed and drained (200 g)
• 1½ cups low-sodium chicken broth (360 ml)
• 1 cup whole milk or half-and-half (240 ml)
• 1 cup cooked chicken, shredded or diced (about 250–300 g) — rotisserie chicken works well
• 1 cup frozen peas (optional)
• 1 cup shredded cheddar or Monterey Jack cheese, divided (about 100 g)
• 2 tablespoons chopped fresh parsley for finishing (optional)
• 1 tablespoon butter, dotted on top before baking (optional)

Equipment

• 9x13-inch (or 2-quart) baking dish
• Large skillet with lid or saucepan for initial sauté
• Oven preheated to 375°F (190°C)

Instructions

1. Preheat and prep

Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish or a 2-quart casserole dish.

2. Sauté the aromatics

Heat the olive oil or butter in a large skillet over medium heat. Add the chopped onion, carrots, and celery. Cook, stirring occasionally, until softened, about 6–8 minutes. Add the garlic and cook 30–45 seconds until fragrant.

3. Season and add rice

Stir in the salt, pepper, and dried thyme. Add the rinsed rice to the skillet and stir to coat the grains in the oil and aromatics for 1–2 minutes — this helps keep the rice separated after baking.

4. Add liquids and simmer briefly

Pour in the chicken broth and milk, bring to a gentle simmer, then remove from heat. Taste the liquid for seasoning and adjust salt and pepper as needed.

5. Combine in the baking dish

Transfer the rice mixture to the prepared baking dish. Scatter the cooked chicken and frozen peas evenly over the rice. Gently stir to distribute, then press the mixture down so the rice is mostly submerged in liquid. Sprinkle ½ cup of the cheese over the top, and dot with the tablespoon of butter if using.

6. Bake

Cover the dish tightly with foil and bake for 30 minutes. Remove the foil, give the casserole a gentle stir to redistribute any surface liquid, then sprinkle the remaining ½ cup cheese on top. Bake uncovered for an additional 12–20 minutes, until the cheese is melted and the rice is tender. If the top browns too quickly, tent loosely with foil.

7. Rest and finish

Let the casserole rest for 5–10 minutes before serving — this helps the rice finish cooking and the sauce thicken. Sprinkle with chopped parsley for color.

Tips and Notes

• Rice type: Long-grain white rice is most forgiving here. Short-grain or brown rice needs more liquid and longer baking time. If using brown rice, increase broth by ½–1 cup and bake 25–35 minutes longer, checking doneness.
• Chicken: Leftover roasted or rotisserie chicken is perfect. For raw chicken thighs or breasts, sear them briefly first and then shred and add; alternatively, cook raw bite-sized chicken pieces in the skillet for 3–4 minutes before adding rice and liquids.
• Creaminess: For a richer casserole, replace the milk with half-and-half or add ¼ cup sour cream or cream cheese blended into the liquid.
• Vegetable variations: Swap peas for broccoli florets, corn, or a handful of chopped spinach (add spinach near the end so it wilts).
• Make-ahead: Assemble the casserole in the dish, cover, and refrigerate up to 24 hours. Add 5–10 minutes to covered bake time if chilled.
• Freezing: Fully cooked casserole freezes well. Cool completely, wrap tightly, and freeze up to 3 months. Thaw in the refrigerator overnight and reheat covered at 350°F (175°C) until warmed through.

Storage and Reheating

• Refrigerate leftovers in an airtight container for up to 3–4 days.
• To reheat: cover and bake at 350°F (175°C) for 15–20 minutes, or microwave individual portions until hot. Add a splash of broth or milk if the casserole seems dry.

Serving Suggestions

• Serve with a crisp green salad and crusty bread for a complete meal.
• A squeeze of lemon or a few dashes of hot sauce brightens the flavors if desired.

Enjoy this simple, comforting chicken and rice casserole — an easy, reliable dinner that becomes even better the next day.