Creating a yeast cell bank

Steve Butchernews

For starters, yeast is a living organism, which means, among other things, temperature affects it. It’s expensive to buy, even if you are only brewing 10-20 batches a year. But, because it’s living, if you set it up right, you can grow it. And you can chill it down to a kind of stasis. So you can create a frozen cell bank of yeast cells from various strains and then thaw individual samples out at a later date to grow up the cells for a future batch of beer…