Smash Burgers with Special Sauce

• 640 gbeef mince (80/20 fat)(divided into 8 × 80 g balls)
• 8 sliceAmerican-style cheddar slices
• 4 piecebrioche burger buns(halved and toasted)
• 60 gmayonnaise
• 2 tbspketchup
• 1 tbspAmerican yellow mustard
• 2 tbspsweet pickle relish
• 0.5 tsponion powder
• 0.5 piecewhite onion(very finely diced)
• iceberg lettuce and sliced tomato(to serve)
• flaky sea salt(to season)

Method

1. 1

   Mix mayonnaise, ketchup, mustard, relish, and onion powder to make the special sauce. Refrigerate until needed.

2. 2

   Heat a cast-iron skillet or griddle over the highest heat until smoking. Place 2 meat balls in the pan, scatter a pinch of diced onion on each, and immediately smash flat with a burger press or spatula. Season with flaky salt and cook 2 minutes without moving.

3. 3

   Flip each patty, lay a cheese slice on top, and cook 1 more minute. Stack two patties per bun. Repeat for remaining burgers.

4. 4

   Spread special sauce on both bun halves, add lettuce, tomato, and double patty stack. Serve immediately.