INGREDIENTS
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10 oz butter (2 1/2 sticks)
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1 tablespoon Pam cooking spray (for baking), optional
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1 egg yolk
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3 oz + 1 tablespoon powdered sugar
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1/4 teaspoon salt
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11 oz all-purpose flour
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4 oz corn starch
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2 tablespoons full cream milk/whole milk
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1/2 teaspoon vanilla extract