I have loved Black and White cookies ever since I can remember! So, I couldn’t wait to add this recipe to the site. A lot of people don’t know that that these cookies are actually like little cakes. Combining that light, fluffy cookie and the delicious icing was a delicious idea that I wish I came up with. Enjoy this recipe! Ingredients for Cookies: 1/2 teaspoon baking soda 1/2 teaspoon salt 1/3 cup well-shaken buttermilk 1/2 teaspoon vanilla 1/3 cup unsalted butter (softened) 1/2 cup granulated sugar 1 large egg Ingredients for Icings 1 1/2 cups powdered sugar 1 tablespoon light corn syrup 2 teaspoons fresh lemon juice 1/4 teaspoon vanilla 1 to 2 tablespoons water 1/4 cup unsweetened Dutch-process cocoa powder Instructions: Preheat oven to 350°F. Whisk together flour, baking soda, and salt in a bowl. Stir together buttermilk and vanilla in a cup. Beat together butter and sugar in a large bowl with an electric mixer until pale and fluffy, about 3 minutes, then add egg, beating until combined well. Mix in flour mixture and buttermilk mixture alternately in batches at low speed (scraping down side of bowl occasionally), beginning and ending with flour mixture. Mix until smooth. Spoon 1/4 cups of batter about 2 inches apart onto a buttered large baking sheet. Bake in middle of oven until tops are puffed and pale golden, and cookies spring back when touched, 15 to 17 minutes. Transfer with a metal spatula to a rack and chill (to cool quickly), about 5 minutes. Let cookies cool completely before icing them. Stir together powdered sugar, corn syrup, lemon juice, vanilla, and 1 tablespoon water in a small bowl until smooth. Transfer half of icing to another bowl and stir in cocoa, adding more water, 1/2 teaspoon at a time, to thin to same consistency as white icing. Turn cookies flat sides up, then spread white icing over half of each and chocolate over other half.