Marbled Black Cocoa Cookies Recipe: How to Make It

Ingredients

• 1 cup unsalted butter, softened
• 1/2 cup packed dark brown sugar
• 1/2 cup granulated sugar
• 1 large egg, room temperature
• 2 teaspoons vanilla extract
• 2-3/4 cups all-purpose flour
• 1/4 cup black baking cocoa
• 1/4 cup Dutch-processed cocoa
• 1-1/2 tablespoons cornstarch
• 1 teaspoon instant espresso powder
• 3/4 teaspoon salt
• BLACK ICING:
• 3 cups confectioners' sugar
• 2 tablespoons black baking cocoa
• 1 tablespoon Dutch-processed cocoa
• 1/4 cup warm water (110° to 115°)
• 1-1/2 tablespoons light corn syrup
• 1 teaspoon vanilla extract
• 1/4 teaspoon salt
• 1 to 2 tablespoons 2% milk
• Black gel paste food coloring
• COLORED ICING:
• 1 teaspoon clear vanilla extract
• Orange, lime green, violet, and bright white gel paste food coloring