INGREDIENTS
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1 pound ground sirloin
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1 pound ground chuck
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6 tablespoons unsalted butter, frozen
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1 teaspoon kosher salt
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1/2 teaspoon black pepper
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6 American cheese slices
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6 potato hamburger buns
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6 green leaf lettuce leaves
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6 tomato slices
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2 tablespoons mayonnaise
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2 tablespoons ketchup
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2 tablespoons yellow mustard
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18 dill pickle chips