Step 1: Heat the Oven and Prepare the Dish - Preheat your oven to 350°F. Lightly grease a 9 by 13 inch baking dish, making sure you reach the corners because that is where the cheese likes to stick. I usually set the dish on a rimmed sheet pan before filling it. That is not required, but it makes the casserole easier to move and catches any enthusiastic bubbling around the edges.
Step 2: Whisk the Creamy Sauce - In a large mixing bowl, whisk together the cream of chicken soup, sour cream, softened cream cheese, whole milk, garlic powder, onion powder, black pepper, salt, and 1 quarter teaspoon of the paprika. Keep whisking until the cream cheese is mostly smooth and no large lumps remain. A few tiny bits are fine because they will melt in the oven, but starting with softened cream cheese saves your arm and gives you a more even sauce.
Step 3: Coat the Cooked Rice - Add the cooked white rice to the bowl and fold it into the sauce until every grain looks coated. Take a moment to break up any cold clumps with your spoon or spatula. This step matters because evenly coated rice gives you a creamy bite from every part of the pan instead of dry pockets in one corner and too much sauce in another.
Step 4: Fold In the Broccoli, Bacon, and Cheese - Add the lightly steamed broccoli, crumbled bacon, 2 cups of the sharp cheddar, and all of the Parmesan. Fold gently until the ingredients are spread evenly through the rice. Try not to stir aggressively. You want the broccoli to stay in recognizable pieces, and a gentle hand keeps the casserole from turning into a heavy mash.
Step 5: Fill the Baking Dish - Spoon the mixture into the prepared baking dish and spread it into an even layer. Press it lightly into the corners without packing it down too firmly. An even surface helps the casserole heat at the same rate from edge to center, and it gives you a level base for all that cheese and buttery topping.
Step 6: Add the Cheddar and Paprika - Sprinkle the remaining 1 half cup cheddar evenly over the casserole. Dust the remaining 1 quarter teaspoon paprika over the cheese. The paprika does not make the dish spicy. It adds a soft warmth and gives the top a deeper, more appetizing color once the cheese melts.
Step 7: Make the Buttery Cracker Topping - In a small bowl, stir together the crushed Ritz crackers and melted butter until the crumbs are evenly moistened. They should look like damp golden sand with a few larger cracker pieces mixed in. Sprinkle the topping across the entire dish, including the edges, because those crisp corner scoops are usually the first ones claimed at my table.
Step 8: Bake Until Hot and Golden - Bake the casserole uncovered for 40 to 45 minutes. It is ready when the filling is hot, the edges are bubbling, and the cracker topping is golden brown. If you prepared the casserole ahead and it is going into the oven cold, it may need a little extra time. Watch the center rather than relying only on the edges, since the middle is the last part to heat through.
Step 9: Rest and Finish - Let the casserole rest for 10 minutes before serving. I know that is difficult when it smells this good, but the rest gives the sauce time to settle so each scoop holds together instead of spreading across the plate. Sprinkle with chopped parsley if you like, then bring the whole dish to the table and let everyone dig in.