"Found this recipe on Pinterest from the website Cooking Classy with a sprinkle of fancy http://www.cookingclassy.com/2011/11/sugar-cookie-squares/..."
INGREDIENTS
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Sugar Cookie Squares
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1/2 cup Butter
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1 cup Granulated sugar
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1 Egg
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1 Egg white
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1 tablespoon Light sour cream
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1 teaspoon Vanilla extract
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2 1/2 cups All purpose flour
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1/2 teaspoon Baking powder
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1/2 teaspoon Salt
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Vanilla Frosting
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1/4 cup Unsalted butter
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2 cups Powdered sugar
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2 - 3 tablespoons Half-and-half cream
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1 teaspoon Vanilla
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pinch salt