INGREDIENTS
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2 sweet onions
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3 tablespoons butter
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2 pounds ground beef
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2 tablespoons beef base
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1 teaspoon onion powder
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1/2 teaspoon celery seed
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1/2 teaspoon dried parsley
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1/4 teaspoon ground black pepper
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2 tablespoons butter
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8 ounces Grand Cru cheese, grated or very thinly sliced
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12 toasted slider buns or hard rolls, split in half
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Read more at http://www.bunsinmyoven.com/2015/01/27/french-onion-soup-sliders/#eYjzLSmsqSQziQ8e.99