"Chocolate Sugar Cookies let you choose your own adventure: leave them plain drop cookies or make my amazing chocolate frosting on top!..."
INGREDIENTS
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¾ cup (113g) unsalted butter, softened
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¾ cup (150g) granulated sugar
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1 large egg
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1 egg yolk
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⅓ cup (27g) unsweetened cocoa powder
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1 teaspoon vanilla extract
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½ teaspoon baking soda
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½ teaspoon cream of tartar
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½ teaspoon salt
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1 ¾ cups (217g) all-purpose flour
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Granulated sugar (for rolling (optional; see note))
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4 tablespoons (57g) unsalted butter, softened
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2 tablespoons (10g) unsweetened cocoa powder
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1 ¼ cups (141g) powdered sugar
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1 teaspoon vanilla extract
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⅛ teaspoon salt
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1-2 tablespoons milk
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Sprinkles (optional)