"A great twist on the grilled burger! A must for blue cheese lovers, and the sauteed mushrooms finish these off perfectly! I had these at a friend's cook-out, and I had to have the recipe. If you like your meat spicier, feel free to add more spice to the meat mixture...."
INGREDIENTS
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3 lbs lean ground beef
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1 teaspoon salt
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1/2 teaspoon black pepper, freshly ground
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2 (3 ounce) packages cream cheese, softened
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2 tablespoons blue cheese, crumbled
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2 tablespoons onions, minced
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2 teaspoons creamed horseradish
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2 teaspoons prepared mustard
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1/2 lb fresh mushrooms, sliced
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2 tablespoons butter, melted