INGREDIENTS
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1 2 - 2 1/2 - pound fresh beef brisket
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1 large onion, cut into thin wedges
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1 teaspoon chili powder
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1/2 teaspoon garlic powder
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1/4 teaspoon celery seeds
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1/8 teaspoon ground black pepper
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1/3 cup ketchup
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1/3 cup chili sauce
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2 tablespoons packed brown sugar
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1 tablespoon vinegar
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1 tablespoon Worcestershire sauce
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1/2 teaspoon liquid smoke (optional)
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1/4 teaspoon dry mustard
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2 tablespoons cold water
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1 tablespoon all-purpose flour
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8 whole wheat hamburger buns