Having seen a search request land here, here’s my Kottbusser recipe. It’s currently scaled for 10 gallons for brewing on the Ruby Street Brewing 10 gallon rig.
Yesterday’s experiment told me that next time I’ll sour mash the brew. To do that, make your wort as usual but chill down to 120 degrees. Pitch lactobacillus in one of two ways, either as a culture you bought or through throwing a few grains of malt into the warm wort. Keep air away from the wort to avoid culturing acetobacter – you’ll get a vinegary taste if you do. To keep air away, either cover the wort with plastic wrap and by that, I mean floating the plastic on the wort, or use a blanket of carbon dioxide to keep oxygen away from the wort’s surface. In 12-24 hours, take a sample and if it’s tart enough, boil and add your hops. Caution: Don’t let anything you can’t sterilize fairly harshly come in contact with the soured wort. Lactobacillus can be hard to get rid of once you have it. I keep a separate setup of buckets, racking canes and so forth for anything soured. I sour the mash in my kettle since it will be boiled and everything else is very clearly marked. Duct tape is good for this.
Chances are the original beer was soured after the boil. Lactobacillus Delbruckii is sensitive to hop oils so it won’t work quickly as a culture once the beer is hopped. Lactobacillus Brevis is not but it will require very careful handling – it’s a very aggressive spoilage bacterium! To sour in storage, again, cool the wort to 120 degrees. Innoculate the wort and let it cool slowly for a few hours to let your lacto get going, then finish cooling and pitch brewer’s yeast. Let the beer ferment, then bottle or keg as usual. The beer will sour slowly, taking up to three months to develop tartness.
Hat tip to Ron Pattinson for tips on the recipe and techniques used to develop this recipe.
First, a new toy that makes brew day in Colorado much nicer:
That’s a new burner. What makes it nice is on today’s snowy, windy day, it has a wind shield to keep the flame constrained and from blowing about, solving one of my problems, controlling the boil. Previously with my unshielded burner, I had to keep the flame too high to compensate for wind, causing either the boil to stop because the wind blew the flame too much or boilovers when the wind dies down. The shielded flame lets me boil more consistently and at a lower overall level. We’ll see if it has any effect on my beers. I’m guessing more malt flavor.
Now to the beer. A while back the Brew Hut management gave me 10 pounds of Avangard Pilsner malt to test brew. I decided to incorporate it into a multivariable experiment involving 1) the new burner, 2) the new malt and 3) splitting the batch, fermenting with both American Lager and Urquell yeasts. A fourth factor, use of Magnum hops for bittering – I like the idea of clean bitterness. Of course, the finishing hops are pure Saaz….
Aside from the late start, the brew day went without a hitch. I got great conversion from my step mash (145/156/170 degrees F). As mentioned, the boil was uneventful, a great change of pace! In the end, I had to add a bit of water back to the wort to get to near my target gravity of 1.057 – I got 1.060 after the water addition. The wort came out beautiful!
See the break falling out of the pale-blonde wort? And the refractometer in the foreground – best tool I ever bought for the brew day (aside from my wort chiller, and pH meter, and new burner, and kettle….).
In the end, I’m still waiting for the wort to get down to pitch temperature, the low 50s. And I’ll have to change the boil rate in my calculation software. All in all, a pleasant brew. Looking forward to tasting it!
A couple of new tools to make the brew day a little easier. First is a Pocket Scale accurate to 0.1 g:
It’s an AWS SC-2kg, the above link from Amazon should take you right to it. My previous scale was accurate to a gram, meaning when I weighed hops my readings were anywhere from 0.5g low to 0.5g high. Over an ounce, that’s an error of about 2%, not too bad and likely not noticeable at homebrew scale. The problem occurs with brewing salts. If I’m putting 4 grams of gypsum in my brewing liquor, my error is +/- 12.5%. That’s unacceptable for a process geek like me. The same measurement with the new scale is accurate to +/- 2.5%, good enough for homebrew. Above, I’m weighing DME for a starter for my last brew day. I finally got around to making my pumpkin ale just in time to have it ready for Thanksgiving.
The second new gadget was a birthday present from my wife, an oxygenation kit. It’s basically a valve for screwing into disposable oxygen tanks, the little 40 gram ones used with small hand torches, tubing, a HEPAfilter and an airstone. Two minutes oxygenation replaces 30 minutes aeration. I don’t have the equipment to measure how much oxygen is in solution but it should exceed the 8 ppm possible with aeration.
Yesterday was brew day for my Chunkin’ Punkin’ ale. It was good last year, should be better this year. Basically it’s an ESB with four pounds of pumpkin in a 5.5 gal (21 l) batch. I anticipate two teaspoons of pumpkin pie spice in it but here’s where I depart from the normal: Instead of taking a chance on 2 tsp at the end of the boil, I put one in. Then I make a tincture of one tsp pie spice in a couple of ounces of cheap vodka, the cheaper the better. At bottling I start adding it a little at a time until the spice reaches the proper level. Same with the vanilla. The result is a slightly sweet brew reminiscent of pumpkin pie. It doesn’t taste like it but I have the strong malts in the ESB suggesting crust, the spices and mild pumpkin flavor representing the filling and the vanilla the whipped cream.
Saturday I’m brewing on a digital brew sculpture from Ruby Street Brewing. I’ll take pictures and report on my lust following the brew day.
Brewed a Belgian Blonde yesterday. Here it is in the kettle….
It’s a beautiful wort, about 5 SRM in color, clear, dead on my predicted gravity. The finished beer will be darker, courtesy of a batch of candi syrup I made. The starter had a sweet Belgian funk to it, one I look forward to in the finished beer. I do like this style, having tried Ommegang’s version while in Texas.
In other fermented news, wife’s Gewurztraminer is delicious, clear and bright. Summer contest season is beginning, I’ll be entering brews in several. Up tomorrow, how I made that candi syrup.