Name: Black and White Cookie Ice Cream Sandwiches
Total time: 240 min
Yield: 20 cookies, 9 sandwiches
Ingredients: 2/3 cup buttermilk; 2 teaspoons vanilla; 2/3 cup about (11 tablespoons) unsalted butter, softened; 1 cup granulated sugar; 2 large eggs; 2 1/2 cups all-purpose flour; 1 teaspoon baking soda; 1 teaspoon salt; 1 pint vanilla bean ice cream; 1 pink dark chocolate ice cream; 3 cups powdered sugar; 2 tablespoons light corn syrup; 2 teaspoons freshly squeezed lemon juice; 1 teaspoon vanilla extract; 2 to 4 tablespoons water, (plus more for chocolate frosting); 1.3 cup unsweetened dutch process/dark cocoa powder