INGREDIENTS
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2 Tablespoons unsalted butter, softened to room temperature
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2 Tablespoons granulated sugar
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2 Tablespoons light brown sugar (or dark brown)
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2 Tablespoons beaten egg (crack an egg, beat it, and use 2 Tablespoons)
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1/2 teaspoon vanilla extract
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1/4 cup all-purpose flour
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2 Tablespoons unsweetened cocoa powder
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1/2 teaspoon baking soda
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1/4 teaspoon salt
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1/4 cup semi-sweet chocolate chips + 1 Tablespoon, divided
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sprinkles, optional