"Ugly Christmas Sweater Sugar Cookie Bars are the quickest way to make soft frosted sugar cookies for a crowd. No chilling, no cutting, no mess!..."
INGREDIENTS
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candies for decorating
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1 cup unsalted butter, room temperature
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2 1/2 cups powdered sugar
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pinch of salt
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2 teaspoons vanilla extract (see notes)
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1/4 cup milk or whipping cream