Was Gordon Ramsay valid? I have high hopes for this freeze dried bbq sauce! When Gordon roasted me I was using a dehydrator but this time l'm using a freeze dryer. #ramsayreacts Freeze Dryer vs. Dehydrator: A freeze dryer works by freezing things and then pulling the moisture out under a vacuum. A dehydrator uses low heat and a fan to evaporate moisture. Freeze-drying can make foods light, brittle, and highly concentrated. Dehydrating usually makes a denser, leather-like texture. Both usually ke