Preheat & Prep: Preheat oven to 350°F (175°C). Grease a 9×13 inch baking dish with cooking spray or butter.
Cook the Chicken: Heat olive oil in a large skillet over medium-high heat. Season chicken pieces with salt, pepper, and paprika. Cook chicken for 5-6 minutes until golden brown and cooked through. Remove from heat and set aside.
Prepare Broccoli: If using fresh broccoli, steam or blanch for 3-4 minutes until bright green and tender-crisp. If using frozen, thaw completely and drain excess water.
Make the Sauce: In a large mixing bowl, combine cream of mushroom soup, sour cream, mayonnaise, diced onion, minced garlic, thyme, and garlic powder. Whisk until smooth and well combined.
Assemble the Casserole: Add cooked chicken, steamed broccoli, cooked rice, and 1 1/2 cups of cheddar cheese to the sauce mixture. Stir until everything is evenly coated. Transfer mixture to the prepared baking dish and spread evenly.
Add Toppings: Sprinkle remaining 1/2 cup cheddar cheese over the top. In a small bowl, mix panko breadcrumbs with melted butter, then sprinkle over the cheese layer.
Bake & Serve: Bake for 25-30 minutes until bubbly around the edges and golden brown on top. Let rest for 5 minutes before serving.
Kitchen Tools
9×13 inch baking dish
Large skillet
Large mixing bowl
Small mixing bowl
Whisk
Measuring cups and spoons
Knife and cutting board
Wooden spoon
Notes
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