Begin by preheating your oven to 350°F (175°C). This ensures your casserole gets the proper heat for that perfect bake.
In a large pot, prepare your rice according to package instructions. Once cooked, set it aside to cool slightly.
While your rice is cooling, chop the broccoli into bite-sized florets. Blanch them in boiling water for about 2 minutes to retain their color and slight crunch. Drain and set aside.
In a large mixing bowl, combine the cooked rice, chopped broccoli, cream of chicken soup, whole milk, and both cheeses (American and Colby Jack). Mix until everything is well combined. There’s no need to hold back; make sure all the ingredients are evenly distributed!
Butter a 9x13 inch baking dish for easy removal later. Pour your mixture into the dish, spreading it evenly.
In a small bowl, combine the crushed Ritz crackers with the melted unsalted butter. Mix well, then sprinkle this tasty mixture evenly over the casserole. Those crackers will become golden and delicious in the oven!
Place your filled baking dish in the preheated oven. Bake for 30 to 35 minutes, or until the top is nice and golden brown, and the casserole is bubbly.
Once baked, allow the casserole to cool for about 10 minutes before serving. This short wait helps it set up a bit. Serve it warm and enjoy!