INGREDIENTS
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1/2 cup (1 stick) unsalted butter, divided
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8 ounces mixed mushrooms, finely chopped
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2 shallots, finely chopped
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Kosher salt
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1/2 cup water
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1/2 cup milk
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Ground black pepper
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1 cup all-purpose flour
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4 eggs
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3/4 cup crumbled blue cheese