Name: In-N-Out Double Double - Animal Style (Copycat)
Prep time: 30 min
Cook time: 15 min
Total time: 45 min
Yield: 2 burgers
Ingredients: 1/2 pound ground beef ((Kenji recommends 60/40, I used 80/20 and it was perfect)); 1 tablespoon butter; 1 large onion (, finely chopped (about 1 1/2 cups)); Kosher salt; 2 tablespoons plus 2 teaspoons mayonnaise; 1 tablespoon ketchup; 2 teaspoons sweet pickle relish; 1/2 teaspoon sugar; 1/2 teaspoon distilled white vinegar; 2 soft hamburger buns (, (Kenji recommends Arnold, I used local bakery buns)); Freshly ground black pepper; 8 dill pickles chips; 2 quarter-inch-thick slices ripe tomato; 2 leaves fresh iceberg lettuce (, white core section removed, torn to bun-sized pieces); 1/4 cup yellow mustard; 4 slices deli-cut American Cheese ((I bought this from my grocer's deli case))