INGREDIENTS
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1 cup unsalted butter, at room temperature
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1 1/3 cups sugar
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3 cups flour, plus more for rolling
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1/2 teaspoon baking powder
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1/2 teaspoon salt
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1 egg plus 2 egg yolks
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2 teaspoons vanilla extract
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1/2 teaspoon peppermint extract, divided
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20 to 25 drops red food coloring
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15 to 20 drops green food coloring
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10 ounce white chocolate, finely chopped
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5 ounces peppermint candy canes or peppermint candies, finely crushed