Wash fresh fruit or berries in cool water. Remove peel, seeds and stem. Cut fruit into chunks. Purse fruit until smooth. Corn syrup or honey is best for longer storage because it prevents crystals.
Sugar is fine for immediate use or short storage.
Saccharin-based sweeteners could also be used to reduce tartness without adding calories. Aspartame sweeteners may lose sweetness during drying. Leathers from Canned or Frozen Fruit Home preserved or store-bought canned or frozen fruit can be used. Drain fruit, save liquid. Purse fruit until smooth.