INGREDIENTS
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10 oz (280g) unsalted butter, room temperature
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1 egg yolk
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3 oz powdered sugar + 1 heaping tablespoon sugar (100g)
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1/4 teaspoon salt
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11 oz (310g) all-purpose flour
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4 oz (110g) cornstarch
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3 tablespoons milk powder, optional
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2 tablespoons full cream milk/whole milk
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1/2 teaspoon vanilla extract
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Holiday-themed sprinkles