How to freeze-dry milk

• I poured the milk onto trays (with the trays already in the freezer) and let it freeze. I could have put it directly into the freeze-dryer but I only had two trays worth. So, I froze the milk until I had two more trays of something liquidy to process along with it. 
• Then I put the trays into the freeze-dryer and processed the milk
• Next, I placed the dried milk into jars, crushing the flakes down in, creating powdered milk. 
• I vacuum sealed the jars and labelled them with the name and date 
• Next, into a cool, dark storage cupboard.