Foaming with abandon in the Harry Potter closet is a 2-liter Erlenmeyer flask on a stir plate, filled with a starter of White Labs WLP008 East Coast Ale Yeast.

She ain’t pretty, but she’s mah baby.

Anyone reading this who has been using liquid yeast without a starter should jump on the starter train. Seriously. It’s as easy as making a tiny unhopped extract brew, because that’s exactly what you’re doing. Just bring 1-2 liters of water to a boil – higher gravity worts will need bigger starters; see YeastCalc for the volume recommended for your batch – add dry malt extract at a rate of 100 grams per liter and some yeast nutrient if you’ve got it. This will make a wort of 1.035-1.040, which is perfect for a starter regardless of the OG of the batch it’s going in. Boil, cool and pitch the yeast. Ferment for 2 days, then cool in the fridge for at least 24 hours before making the “real” wort. Most of the yeast will drop out when chilled, leaving clear (but vile – don’t drink it) “beer” which should be decanted, leaving behind the yeast cake and just enough liquid to swirl up into a slurry. Pitch and watch the magic happen. If you’ve got good sanitation techniques, making a starter carries minimal risk. The rewards are higher pitching rates and better beer. And it’s so easy, there’s no reason not to.

This starter was pitched with yeast that expired in July. I’ve worked with expired yeast before. The yeast/bacteria blend in my Bacillusferatu Berliner Weisse was expired for ten months before I pitched it, though that was into a 1-gallon test batch of a low-gravity wort intended for souring. This starter is going into five gallons of wort for a very different beer: my long-overdue Colonial Progress Ale, from a recipe slightly modified from one I posted in April. Details forthcoming after I brew it this weekend.

As the photo above shows, the expired yeast is spewing so much krauesen I had to wrap it in a paper towel. The expired yeast are healthy as can be, and that’s no surprise. Sure, the expired vial had no more than about 10% of its original population of viable yeast cells, but so what? Yeast cells are dying every day in every carboy, keg and cask in the world, but fermentation continues. Many homebrewers culture yeast from commercial bottle dregs and make great beer with it. Given enough time, even a few sad, dying yeast cells will get their freak on, reproduce and ferment wort. It’s just that the first generations will be weak and languid, and make lots of foul-tasting byproducts doing it.

The purpose of the starter is to make sure those nasty byproducts end up in a beer that’s destined for the drain, not your gullet … while the real wort gets inoculated with a healthy colony of the naturally selected descendants of those few Saccharomycean pioneers who survived the long winter.

So don’t ever be afraid to use expired yeast. Don’t throw it away. You should be making a starter anyway. For fresh yeast, a starter is a leg up. For expired yeast, it’s a new beginning.

Speaking of new beginnings, best of luck to my friends and fellow writers undertaking National Novel Writing Month (“NaNoWriMo”) this November. The goal is to write 50,000 words of a novel in 30 days: fast, raw, unedited. I’ve done it four of the last five years and made it across the 50k mark each time. But I won’t be doing it officially this year. I’ve got too many short stories I want to work on, and a novel already in progress, and I don’t want to distract myself with something new. But I am using November as an excuse to write every day: a blog post, story, novel chapter, anything. I did catch wind of a blog-centric version (“NaBloPoMo”), but I love my readers far too much to subject you all to a bunch of hurried blog posts on whatever random bullshit I can think of to write about.

What do you mean, too late?