Method
- Preheat oven to 375°F (190°C). Lightly grease a 9x13 inch baking dish.
- In a large saucepan, melt butter over medium heat. Add diced onion and celery and sauté until softened, about 5 minutes.
- Whisk in the flour and cook for 1 minute, stirring constantly.
- Gradually whisk in the chicken broth, then the milk, until smooth. Stir in the garlic powder, onion powder, salt, and pepper.
- Bring the sauce to a simmer and cook for 2-3 minutes, until thickened. Remove from heat.
- To the sauce, add the cooked chicken, cooked rice, frozen peas, and 1 cup of the shredded cheddar cheese. Stir until well combined.
- Pour the mixture into the prepared baking dish and spread evenly. Top with the remaining 1 cup of cheddar cheese.
- Bake for 25-30 minutes, or until the casserole is bubbly and the top is golden brown.
- Let the casserole rest for 5-10 minutes before serving to allow it to set.
Nutrition
Notes
For a crunchy topping: Toss 1/2 cup of panko breadcrumbs or crushed crackers with 2 tablespoons of melted butter and sprinkle over the cheese before baking.
Make-ahead tip: Assemble the casserole without baking, cover tightly, and refrigerate for up to 2 days before baking as directed.
Make-ahead tip: Assemble the casserole without baking, cover tightly, and refrigerate for up to 2 days before baking as directed.
