Freezing, Canning & Fermenting Basics
FREEZING BASICS Freezing is the easiest of all preserving methods and works for a variety of fruits and vegetables. Learn the basics to get started. THE SCIENCEOF FREEZING HOW FOOD FREEZES Food contains water, and when a food is exposed to temperatures of 32°F or colder, the molecules in the water slow down and cluster, eventually crystallizing until the food is completely frozen. WHAT CHANGES IN FREEZING The crystals formed during freezing take up more space than water. For foods like meat that have flexible cell walls, this isn’t a big deal. But for veggies with stiffer cell walls, the ice crystals can break the cell walls and cause the food to collapse when thawed. Blanching (tip, below) helps to soften cell walls in produce, making them more flexible. Also, the faster a food…