1/2cupBaconnaise SauceRoom temperature for easy spreading
4piecesBurger BunsSplit and toasted if desired
4slicesAmerican or Cheddar CheeseOptional
2tablespoonsVegetable OilFor cooking onions and griddle lubrication
Instructions
Preheat a griddle or heavy skillet over medium-high heat until very hot. Lightly oil the surface.
Divide the ground chuck into four equal portions and loosely form each into a ball.
Place the meat balls on the hot cooking surface and smash each ball down with a heavy spatula to form thin patties (about 1/4-inch thick).
Season each patty with salt, black pepper, and garlic powder right after smashing.
Cook the patties for about 3–4 minutes until a deep brown crust forms on the bottom.
Flip the patties carefully and cook for an additional 2–3 minutes. If using cheese, place a slice on each patty during the last minute of cooking.
While the burgers cook, heat 1 tablespoon of oil in a separate pan over medium heat. Add the onions and cook until soft and caramelized — about 10–12 minutes.
Assemble the burgers: spread baconnaise on the bottom bun, place the cooked patty, top with caramelized onions, and finish with the top bun.
Notes
Store leftover patties and onions separately in airtight containers for up to 3 days. Keep baconnaise chilled in a sealed jar for up to one week.