Getting Started with Yeast Starters

Over the past year, I’ve been experimenting with several new techniques related to beer brewing. These include full-volume boils, temperature-controlled fermentation, and all-grain brewing. For my upcoming batch, a pumpkin ale, I decided to try my hand at making a yeast starter. This will allow me to use a wider variety of yeasts and also prepare for the eventuality of making lagers (which seem to pretty much require a starter).

The equipment is fairly simple: a 2-liter Erlenmeyer flask (pictured at left) and some aluminum foil.

The procedure itself is fairly simple, too. I boiled 172 g (~6 oz.) of extra light dry malt extract in 1.5 L of water for 10 minutes, to produce an unhopped wort with a gravity of ~1.040. I decanted the hot wort from the saucepan into the flask, which was capped with foil and plunged into an ice bath. After about 10 minutes, the container (and presumably the wort) were cool to the touch.

Once the wort was cooled, I pitched a tube of White Labs WLP001 (California Ale) yeast into the flask, shook it up, covered with sanitized foil, and set the flask in a relatively safe and warm corner. For this batch, I’m agitating (i.e., swirling) the mixture whenever I happen to be by the area, so roughly ever 30 to 60 minutes. If I have the time before my next brewing session (which probably won’t be until late November or early December), I may build a stir plate.

Bonedigger Brown Ale Bottled

Two weeks after brewing, tonight (11 October 2014) I bottled my Bonedigger Brown Ale. Although my usual practice is to transfer to a secondary, I decided to bottle directly from the primary fermenter. Although perhaps a little extra yeast might have made it into the bottles, I figured this wouldn’t make the beer “out of style”.

Upon transfer to the kegs and bottling bucket, I noted that the flavor is nice and smooth, with a definite hint of the Maris Otter malt that I used as a supporting character in the grist. This is going to be pretty delicious once carbonated, I think! At bottling time, the beer had a final gravity of 1.014, down from 1.057. This works out to 5.7% abv.
I primed two 5-L kegs with 1.5 tbs. corn sugar each, and filled them with beer. This left 2.2 gallons, which I primed with 1.8 oz. of corn sugar boiled in 1 cup water, to achieve carbonation of 2.4 volumes. The result was 6 22-oz. bottles, 2 18-oz. bottles, and 9 12-oz. bottles.

Bonedigger Brown Ale

Things finally seem to be clicking along with my all-grain setup; I’ve got my mash tun properties dialed in, my grain mill configured, and everything else coming up aces. The all-grain learning curve is perhaps a bit frustrating, after feeling like I was so proficient at extract brewing, but it feels like the pay-off is finally here. I’m now getting consistent extract efficiency (thanks in large part to owning my own grain mill), and the beers are turning out quite tasty.

For today’s brew session, I wanted to play with a style I haven’t brewed previously: American brown ale. Looking back at the blog, I brewed a British-style nut brown from a kit a few years back, but that’s it! I got some advice from Ray Daniels’ Designing Great Beers, and set up a recipe in BeerSmith. I was also inspired by a recent visit to Rök House Brewing Company, which had an incredibly tasty SMaSH ESB; on asking, I learned that the wonderfully malty flavor was courtesy of Maris Otter malt. So, I knew I had to incorporate that into my next recipe!

Bonedigger Brown Ale

  • 9 lbs. 2-row malt
  • 1 lb. Maris Otter pale malt
  • 0.75 lb. 80°L crystal malt
  • 0.5 lb. carapils malt
  • 0.5 lb. chocolate malt
  • 1 oz. Cascade whole hops, bittering (60 minute boil)
  • 1 oz. Cascade whole hops, bittering (20 minute boil)
  • 0.5 oz. Willamette hops pellets, aroma (5.3% alpha; 3.7% beta; 5 minute boil)
  • 1 tsp. Irish moss (10 minute boil)
  • 1 pkg. US-05 Safale American Yeast
Procedure
  • I mashed in with 3.75 gallons of water at 165°. This hit my target mash temperature of 153°. The mash ended at around 151-152°, an hour later.
  • After 60 minutes, I stirred in 0.82 gallons of water just below boiling temperature, and let this sit for 10 minutes. I collected ~3.1 gallons of first runnings.
  • Then, I added 3.14 gallons of water at 185°; the mash temperature stabilized at 168°. I let it sit for 10 minutes.
  • After the second runnings, I had collected 6.5 gallons of wort with a gravity of 1.049. This works out to 75.7% efficiency.
  • I brought the wort to a boil, and added the hops as indicated. The wort boiled for a total of 60 minutes.
  • After flame-out, I cooled the wort to ~78° using my wort chiller, whirlpooled, rehydrated the yeast, and pitched the yeast. I will be fermenting this beer for 2 weeks at 65°.
  • Starting gravity is 1.057, with a total of 5.1 gallons of wort. I brewed this up on 27 September 2014.

Edmund Fitzgerald Porter Clone Bottled

After 12 days in the secondary fermenter, I bottled the Edmund Fitzgerald Porter Clone on Friday, September 26. The yeast had settled out the rest of the way quite nicely, with a thin and compacted cake at the bottom of the carboy.

I elected to bottle the entire batch of beer, rather than kegging. Thus, I measured out 3.2 oz. of priming sugar; with ~4.75 gallons of beer, this works out to around 2.1 volumes of CO2 for the batch. The end result was 18 12-oz. bottles, 14 18-oz. bottles, and 6 22-oz. bottles.

At bottling, final gravity was unchanged from the last check, at 1.016. With a starting gravity of 1.060, this translates to 5.8% abv.

Beer Update: Vaalbara Session IPA & Edmund Fitzgerald Porter Clone

Today was a bit of “housekeeping” with my two latest brews–one batch to bottle, one batch to transfer to the secondary fermenter.

Vaalbara Session IPA
After two weeks of dry-hopping, I was ready to bottle this batch. The final gravity was 1.011; with a starting gravity of 1.045, this works out to 4.6% abv. The flavor and aroma are both quite pleasant!

The final yield as two 5-L mini-kegs (each primed with 1.5 tbs corn sugar), 3 12-oz. bottles (primed with one carbonation drop each), and 2 22-oz. bottles (primed with two carbonation drops each). Given the small volume that was not kegged, I didn’t feel the desire to mess around with corn sugar.

Edmund Fitzgerald Porter Clone
This beer has been in the primary for just over two weeks, so it was high time to move it to the secondary fermenter. The gravity is down to 1.016 from 1.060, or about 5.8% abv. Even better, it’s delicious! The beer has a nice roasty flavor (thank you, roasted barley!), black color, and is very definitely a “robust” porter. I’m going to let it sit in the secondary fermenter for at least two weeks, at around 66°.

In other news…
I tapped one of the Gondwana Pale Ale 1.1 mini-kegs. The beer is quite tasty, with well-balanced hops and malts, as well as a fantastic Citra hop aroma. The recipe is a keeper! If I have any minor complaint at the moment, it is that the carbonation is a little lower than I might like. I suspect this is because the keg has been kept cool (~66°), so a few more weeks of conditioning and carbonation are in order for the other keg.