INGREDIENTS
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4 large egg whites
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1 cup packed light-brown sugar
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1/4 teaspoon salt
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1 1/2 cups (3 sticks) unsalted butter, room temperature, cut into pieces
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1/2 cup (1 stick) unsalted butter, melted, plus more for pans
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2 cups all-purpose flour (spooned and leveled), plus more for pans
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2 teaspoons baking soda
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1/2 teaspoon baking powder
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2 teaspoons ground cinnamon
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1/2 teaspoon ground ginger
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3/4 teaspoon salt
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2 cups packed light-brown sugar
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2 large eggs
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4 Granny Smith apples, peeled, two coarsely grated and two diced