Yes, Starbucks employees are expected to memorize the recipes and preparation methods for a wide variety of coffee and tea drinks, as well as food items and other menu offerings. This knowledge is important for providing consistent quality and service to customers, and is a key part of the barista training program at Starbucks. However, Starbucks also provides training materials and resources to help employees learn and master the different drinks, and there are tools and systems in place to assist with the ordering and preparation process.