INGREDIENTS
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2 1/2 cups all-purpose flour
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1/2 teaspoon baking powder
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1/4 teaspoon fine salt
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1 cup (2 sticks) unsalted butter, at room temperature
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3/4 cup granulated sugar
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3/4 cup confectioners' sugar
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2 large egg yolks
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1 teaspoon pure vanilla extract
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1/4 teaspoon finely grated orange zest
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Coarse sugar, aka sanding or crystallized sugar
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Royal Icing, recipe
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5 tablespoons meringue powder (egg white powder)
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6 tablespoons water
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1 pound confectioners' sugar (about 3 3/4 to 4 cups or 1 box)
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Food coloring, as desired