Try this homemade Supreme Rice Casserole(Microwave) recipe the whole family will love. Made with butter, rice, onion soup and fresh mushrooms. Easy step…
This Supreme Rice Casserole(Microwave) relies on simple, everyday ingredients such as butter, cut in chunks, uncooked minute rice, (10 3/4 oz.) can onion soup and pepper. It comes together quickly and makes 4 servings, at about 509 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.
Updated Jun 30, 2026