My aunt gave me the secret to recreating her favorite late night order. It seems so simple but the flavor is completely out of this world. The combination of the greasy crunch and the gooey center is

For picky eaters, you can skip the onions on their sandwich and simply add extra cheese. If your family prefers milder flavor, use American or mild cheddar instead of Swiss. To stretch the recipe, make smaller patties and use regular sandwich bread cut in half for kid-sized melts. For a slightly lighter version, use 90/10 ground beef and just 1 tablespoon of butter per sandwich, adding a quick spray of cooking oil to the pan if needed. If you love extra onion flavor, cook three onions instead of two and pile them high. For a classic diner twist, spread a thin layer of yellow mustard or Thousand Island dressing on the inside of the bread before grilling. You can also swap in rye bread for a more traditional patty melt taste, or use sourdough if that’s what you keep on hand. To make ahead for busy nights, cook the onions and shape the patties earlier in the day, then just sear, assemble, and grill when everyone’s hungry.