INGREDIENTS
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1 1/4 cups (2 1/2 sticks) unsalted butter, room temperature, plus more for pan
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1 1/2 cups packed light brown sugar
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3 tablespoons Calvados
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3/4 teaspoon plus a pinch of salt
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3 whole cinnamon sticks
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6 Braeburn or McIntosh apples (about 2 1/2 pounds), peeled, cored, and cut into 1/4-inch-thick rings
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2 1/4 cups all-purpose flour
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1/2 teaspoon baking soda
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1/2 teaspoon baking powder
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3/4 teaspoon ground cinnamon
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1 1/2 cups granulated sugar
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3 large eggs
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1 1/2 teaspoons vanilla extract
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1/2 cup sour cream