We have vinegar.

Well it's finally done.  Today I strained my pineapple vinegar into a clean mason jar and gave it a taste.  It tastes...well, like vinegar.  It is milder than apple cider vinegar, but perhaps slightly stronger than rice vinegar.  It has a flavor that is similar to the previously mentioned tepache, but much tarter and much less beery.  I'll have to post a follow-up after I've had a chance to try it in a few recipes.

Are we there yet?

Not quite yet.  It's been about 10 days since my little pineapple vinegar experiment began.  Four days ago, I pulled out the last pieces of pineapple rind.  The color has definitely changed.  It's noticeably lighter.  However, it still smells quite beery.  Not so much like a vinegar yet.  I'm going to give it another week or so then give it a taste and see where we are.

We have arrived at Tepache

My mother pointed out that the procedure I was following to make pineapple vinegar, was in fact very similar to what she used to do to make tepache.  Tepache is a fermented beverage made from pineapple rinds and sugar.  It is slightly alcoholic, perhaps 2% - 3% by volume, and it is relatively common in Mexico.  I remember drinking it in the summer time as a kid.  It's an acquired taste.  Sort of like a fruity beer gone wrong.

Mom said, she did the same thing, but she'd not add sugar until after the second day of fermentation.  By day three, the tepache was strained and ready for drinking.  Most recipes I found for it, call for some spices, usually cinnamon, sometimes cloves, to be added to the mix at the beginning of the process.

This makes perfect sense if you think about it.

Apples -> Apple Cider -> Apple Cider Vinegar
Grapes -> Wine -> Wine Vinegar
Pineapples -> Tepache -> Pineapple Vinegar

Here's what my batch of pineapple vinegar looks like today.  It has the aroma I remember from my childhood, but I'm not going to drink any of it, as I don't want to screw up my batch of vinegar.  Perhaps I'll make a batch of true tepache in a week or so and see how that turns out.

Wild Bacteria Experiment 1 - Pineapple Vinegar

Wild Yeast Experiment 2 - Pineapple Vinegar

Wild Bacteria Experiment 1 - Pineapple Vinegar

I did a bit more reading, and apparently bacteria is responsible for the process of turning sugars to vinegar not yeast.

I was perusing Diana Kennedy's The Cuisines of Mexico the other day and ran across her recipe for pineapple vinegar.  I was cutting up a fresh pineapple for breakfast this morning, and decided to give it a shot.

All you have to do, is take the skin from a half a pineapple, a few chunks of the fruit, some brown sugar, and water, throw it all in a jar, cover it with plastic, set it on the counter, and wait.  The process is supposed to take about 3 weeks.  Wish me luck.