"Mix colored sugars (or use leftover sugar from your work surface) to create new shades for these holiday treats...."
INGREDIENTS
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4 cups all-purpose flour (spooned and leveled), plus more for working
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1 teaspoon baking powder
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3/4 teaspoon coarse salt
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1 1/4 cups (2 1/2 sticks) cold unsalted butter, cut into 1/2-inch pieces
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3/4 cup sugar, plus more for decorating (optional)
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1 large egg plus 1 large egg white, lightly beaten
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2 teaspoons finely grated lemon zest
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