a sour-tasting drink make from milk fermented with certain bacteria.
Well, I have a friend who is Russian and she pronounces it key-feer...with one giant roll of the r at the end. Someday I'll say it right. We're debating whether to buy the real, live grains, but they require daily babysitting and we're not sure if we're up for it. In the meantime, a local market started carrying the freeze dried starter packages, which does the trick for now.
Hmmm, good! This was my first batch, and I've since found that it's even better with a little mango and pineapple mixed in. =)