Marble Cookies Cuisine: American Prep time: 20 mins Cook time: 25 mins Total time: 45 mins Serves: 4 Ingredients 2 cup all purpose flour 1/2 tsp baking powder 1/4 tsp salt 1/2 cup light brown sugar 1/2 cup white sugar 1 large egg 1/2 cup sour cream 1 tsp vanilla extract 1 cup semisweet chocolate