Girl Scouts Debut New 'Lemon-Ups' Cookie Following last year's Caramel Chocolate Chip, the organization has introduced "Lemon-Ups" to its cookie ranks. The treat arrives just in time, as Girl Scout cookie season starts up this month. "Lemon-Ups" are shortbread-flavored with a lemon glaze. They also have encouraging messages on them such as "I'm a leader." Girl Scouts' Stewart Goodbody, via 'Today' Depending on your location, "Lemon-Ups" will not be available everywhere in the U.S. You will still be able to get "Lemonades," a thinner cookie with lemon icing.