15L cake mixer, typically a commercial planetary mixer, is used in professional kitchens like bakeries, restaurants, and catering to efficiently mix large batches of dough, batter, cake mixes, and other food products like mashed potatoes and meat for meatballs. Its large 15-liter capacity is designed for medium-volume operations, offering a balance between size and output, and it often comes with various attachments (beater, dough hook, wire whip) for different food textures and preparations.