"These Lemon Sugar Cookie bars are these thick and chewy lemon sugar cookies frosting with vanilla buttercream...."
INGREDIENTS
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1 cup (2 sticks) unsalted butter
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2 cups granulated sugar
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2 large eggs
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1 teaspoon lemon extract
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Zest of 1 lemon
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3 cups all-purpose flour
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1/2 teaspoon baking soda
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1/2 teaspoon cream of tarter
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2 sticks unsalted butter
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3 1/2 cups powdered sugar
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1 tablespoons heavy whipping cream
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1 teaspoon vanilla bean paste or vanilla extract
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Zest 1 lemon