Preheat your oven to 350 degrees Fahrenheit.
Wash the rice until the water runs clear—don't skip this step!
In a bowl, combine rice, salt, and pepper, ensuring the rice is well-coated.
In a 4-quart Dutch oven, coat the inside with butter and sour cream evenly.
Add rice, heavy cream (or milk), clotted cream, and broth without stirring. A gentle swirl is okay, but avoid touching the bottom and sides.
Cover and bake for 2 hours at 350 degrees Fahrenheit.
Remove from the oven and serve immediately.