Ingredients:

  • 0.5 cup full fat mayonnaise
  • 2 tbsp yellow mustard
  • 1 tbsp sweet pickle relish
  • 1 tsp smoked paprika
  • 0.5 tsp garlic powder
  • 0.5 tsp onion powder
  • 2 lbs 80/20 ground chuck
  • 1 large yellow onion
  • 8 slices American cheese
  • 4 potato buns
  • 4 tbsp unsalted butter
  • 1 tsp kosher salt
  • 0.5 tsp coarse black pepper

Instructions:

  1. In a small bowl, whisk together the mayonnaise, yellow mustard, sweet pickle relish, smoked paprika, garlic powder, and onion powder. Set aside to let flavors marry.
  2. Portion the cold ground chuck into 8 equal spheres, approximately 4 ounces each. Do not overwork the meat. Keep the beef spheres refrigerated until ready to cook.
  3. Using a mandolin, slice the yellow onion into paper-thin, translucent slices.
  4. Preheat the Blackstone griddle to 450°F (High heat). Melt 2 tablespoons of butter and toast the potato buns until golden brown. Remove and set aside.
  5. Apply the remaining butter to the griddle. Place the cold beef spheres onto the hot surface, leaving ample space between each.
  6. Place a generous pile of thin onions directly on top of each beef sphere.
  7. Cover the beef and onions with a square of parchment paper. Use a heavy-duty spatula or burger press to smash the beef firmly into the griddle for 10 seconds, creating thin patties with lacy edges.
  8. Remove parchment and season generously with salt and pepper. Cook for approximately 2 minutes until a deep mahogany crust forms.
  9. Use a bench scraper to scrape under the crust and flip the patties. Immediately top each with a slice of American cheese.
  10. Once the cheese is melted, stack two patties together. Place on toasted buns prepared with the smash burger sauce and serve immediately.