1-Step One: Prepare the Broccoli and Rice Start by cooking your rice if you have not done so ahead of time. For the best flavor, cook 2/3 cup of uncooked white rice in chicken broth instead of water. This simple step infuses the rice with savory flavor that carries through the entire dish. You will end up with approximately 2 cups of cooked rice. Set it aside once done. While the rice cooks, prepare your broccoli. Cut fresh broccoli heads into bite-sized florets, aiming for uniform pieces about 1 to 1 1/2 inches in size. You want 6 cups total, which typically requires about 1 1/2 to 2 medium heads of broccoli. Uniform sizing ensures even cooking.

2-Step Two: Blanch the Broccoli Bring a large pot of salted water to a rolling boil. Add the broccoli florets and cook for 1 to 2 minutes until they turn bright green and are tender-crisp. Test by piercing a floret with a fork; it should offer slight resistance but not be hard. This brief cooking time preserves the vibrant color, crisp texture, and valuable nutrients. Immediately drain the broccoli and transfer it to an ice water bath to stop the cooking process. Let it cool for about 1 minute, then drain thoroughly and pat dry with paper towels. This step is essential because it prevents the broccoli from becoming mushy during the 35-minute bake time.

3-Step Three: Build the Cheese Sauce Base Preheat your oven to 350 degrees Fahrenheit. Grease a 2-quart casserole dish with butter or cooking spray and set it aside. In a medium saucepan or Dutch oven over medium heat, melt 3 tablespoons of butter. Add 1 small diced onion and cook for 3 to 4 minutes until softened and translucent, stirring occasionally. The onion should be fragrant but not browned. Sprinkle 3 tablespoons of all-purpose flour over the melted butter and onions. Stir constantly for about 1 minute to cook off the raw flour taste. This butter-flour mixture, called a roux, is what will thicken your sauce to the perfect consistency.

4-Step Four: Add Milk and Create the Creamy Sauce Slowly pour 2 cups of milk into the roux while whisking constantly. Adding the milk gradually prevents lumps from forming and creates a smooth sauce. Continue whisking as the mixture comes to a gentle simmer. Cook the sauce for 3 to 5 minutes, whisking frequently, until it thickens enough to coat the back of a spoon. When you run your finger through the sauce on the spoon, the line should hold its shape. This thickness ensures the casserole sets properly during baking. Remove the saucepan from the heat. Stir in 3 tablespoons of cream cheese until completely melted and smooth. Add 1 1/2 cups of shredded sharp cheddar cheese (save the remaining 1/2 cup for topping), 3/4 teaspoon garlic powder, 1/2 teaspoon black pepper, 1/2 teaspoon dry mustard powder, 1/2 teaspoon paprika, and 1/2 teaspoon salt. Stir until the cheese is fully melted and the seasonings are evenly distributed. Taste the sauce and adjust the salt if needed.

5-Step Five: Combine Everything Add the blanched broccoli florets and 2 cups of cooked rice to the cheese sauce. Stir gently until all the ingredients are well coated. Use a spatula to scrape the sides and bottom of the pan to incorporate every bit of that creamy sauce. Transfer the mixture to your prepared casserole dish, spreading it into an even layer. Sprinkle the remaining 1/2 cup of shredded sharp cheddar cheese evenly over the top. This cheese layer will melt and create a golden, slightly crispy topping as it bakes.

6-Step Six: Bake to Perfection Place the casserole dish in your preheated 350 degree Fahrenheit oven. Bake for 35 minutes until the sauce is bubbling around the edges and the top is lightly browned in spots. If you want extra browning on the cheese, you can broil for the last 1 to 2 minutes, but watch carefully to prevent burning. Remove the casserole from the oven and let it rest for 5 to 10 minutes before serving. This resting period allows the sauce to set slightly so the casserole holds its shape when you scoop it. Serve warm and enjoy the creamy, cheesy goodness.