THE SHACKBURGER
Serves 4.
Note: "Like most deceptively simple things, it took us years to get it right, but now you can master burger perfection in five minutes," write Randy Garutti and Mark Rosati in "Shake Shack: Recipes & Stories."
• 4 hamburger potato buns
• 4 tbsp. unsalted butter, melted
• 4 tbsp. ShackSauce (see recipe)
• 4 pieces green leaf lettuce
• 8 (1/2-in.) slices ripe plum tomato
• 1 lb. very cold (but not frozen) ground beef, divided into 4 pucks