"Apple Pie Bars with buttery streusel topping make pie portable...."
INGREDIENTS
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1 1/2 cup plus 1/3 cup all-purpose flour (divided)
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1/2 cup powdered sugar
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1/4 tsp. salt
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12 tablespoons cold unsalted butter (cut into small chunks, divided)
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1 egg
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2 large tart apples (such as Pink Lady (approximately 1 1/4 pounds), peeled, cored, and sliced thinly)
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4 tablespoons granulated sugar (divided)
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1 teaspoon cinnamon
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1 teaspoon pure vanilla extract
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2 tablespoons brown sugar