INGREDIENTS
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1 cup (2 sticks) unsalted butter
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1/2 cup creamy peanut butter
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2 cups firmly packed light or dark brown sugar
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2 eggs, at room temperature
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2 teaspoons vanilla
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4 1/2 cups all purpose flour (see note to insure you're measuring this correctly)
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2 teaspoons baking powder
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1/2 teaspoon baking soda
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1 teaspoon salt
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3 cups confectioner's sugar
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Water or milk
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Food coloring
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1/2 cup semi sweet chocolate chips