"Featuring a flaky dough stuffed with mashed potatoes and onions, potato knish is comfort in dumpling form. Use this knish recipe to make this classic Jewish nosh from scratch...."
INGREDIENTS
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6-1/2 cups all-purpose flour
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3 teaspoons baking powder
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1-1/2 teaspoons salt
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1-1/2 cups cold butter
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9 ounces sour cream
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3 to 4 tablespoons water
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FILLING:
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1 pound medium potatoes, peeled and cubed (about 2 cups)
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1/4 cup butter, cubed
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3 medium onions, finely chopped
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1 teaspoon salt
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1/4 teaspoon pepper
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2 large eggs, divided use
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Sour cream, optional