This Blackstone Griddle Patty Melt is a mouthwatering twist on a classic diner favorite! Juicy smashed burger patties, perfectly caramelized onions, and melty Swiss cheese are stacked between buttery toasted bread and griddled to golden perfection. Inspired by the famous Whataburger Patty Melt, this homemade version is easy to make and bursting with flavor—perfect for backyard barbecues, family dinners, or weekend indulgence.
Begin by adding 1-2 tablespoons butter to the hot Blackstone Griddle. Add the sliced onions and season with salt and pepper. Flip frequently until they are the texture and color you like.
Add hamburger to a greased griddle and smash down to form a flattened patty. Season with Blackstone Whiskey Burger Seasoning. Sprinkle with salt and pepper. Cook until the bottom side develops a slight crust.
Flip the burgers, and add a little more seasoning, salt and pepper. Finish cooking until the burger reaches desired doneness.
Butter the bread and toast on the Blackstone. Flip and toast second side.
Add caramelized onions to the burger and top with a slice of swiss cheese. Let sit until the cheese gets melty. Add the 2 burger patties for each patty melt and serve. Enjoy!