Wsar , you need a food dehydtrator. Mine came with plastic fruit leather trays. litley grease trays with butter or olive oil and pour a can of cambells tomato soup on tray. dry till untacky. I then grind to powdery consistancy in blender. Put powder in ziplock bag with about 1/4 C powdered milk. Store in freezer till backpackin trip. Add about 1.5 C boiling water to bag let sit about ten min and enjoy!