Ingredients

  • 2 lb. ground chuck
  • 1 lb. ground sirloin
  • 3 Tbsp. steak sauce
  • 6 extra-large egg yolks
  • 1 1/2 tsp. salt
  • 3/4 tsp. black pepper
  • 4 Tbsp. cold unsalted butter
  • 12 hamburger buns

Method

  • Carefully mix the meats, steak sauce, egg yolks, salt and pepper with the tines of a fork, but do not mash it. Lightly form each burger and lightly press into a patty shape. Make an indention and put a thin slice of butter inside each burger, making sure the butter is entirely encased in the meat. Grill or broil as you would any other burger.