INGREDIENTS
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For the shack sauce:
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1/2 cup mayonnaise
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1 tablespoon ketchup
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1 tablespoon yellow mustard
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4 slices kosher dill pickles
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1/4 teaspoon garlic powder
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1/4 teaspoon paprika
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Pinch cayenne pepper
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For the burgers:
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8 ounces ground beef sirloin
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4 ounces ground beef chuck
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4 ounces ground beef brisket
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2 tablespoons butter, at room temperature
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4 potato burger buns, such as Martin's Sandwich Rolls
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4 tablespoons shack sauce
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4 leaves of green-leaf lettuce
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8 slices ripe plum tomatoes
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1/2 teaspoon vegetable oil
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Kosher salt
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Black pepper, freshly ground
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4 slices yellow American cheese