Try this homemade White Castle Portabellas recipe the whole family will love. Made with hamburgers, baby portabella mushrooms, butter and cream of mushr…
This White Castle Portabellas relies on simple, everyday ingredients such as white castle hamburgers, butter, water and beef bouillon cube. It comes together quickly and makes 4 servings, at about 514 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