Described herein are a method and system for cooking viscous fruit product composed of a high proportion of fruit from a fruit based slurry. The method includes heating the slurry in a heat exchanger, and subjecting the slurry to a vacuum in a vacuum chamber. The vacuum removes moisture from the slurry. The system includes a heat exchanger for heating the slurry to promote evaporation, and a vacuum chamber fluidly coupled to the heat exchangers. The vacuum chamber generates a vacuum that removes moisture from the slurry. Using the described method and system, a viscous intermediate fruit product composed of a high proportion of fruit, as high as 100% fruit, can be made. The viscous intermediate fruit product can subsequently be formed into consumable end fruit products.