Try this homemade Portabella and Onion Topping for Hamburgers recipe the whole family will love. Made with portabella mushrooms, Spanish onion, garlic a…
This Portabella and Onion Topping for Hamburgers relies on simple, everyday ingredients such as medium spanish onion, olive oil and american cheese. It comes together quickly and makes 4 servings, at about 178 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026