The two-batch mash

I had let myself become perilously low on homebrew, so I had to replenish the stores. I planned a 3-batch day: one extract (a 5-gallon version of my Kambucha sour) and two all-grain beers. To economize on time I tried to do as much as possible at once — working off both the stove and my propane burner. So I mashed while the extract batch was on the stove, and the mash was enough for both of the other beers.

To 16 pounds American 2 row I added 5.3 gallons of strike water at 164F and let it sit for a little over an hour. That yielded 1st runnings of 3.25 Gallons @ 22.4 brix.

The two beers I wanted to make from this mash were my California Common and my American Brown Ale. The Common is a little stronger than the Brown Ale, so I accounted for that by using different portions of the first and second runnings in each batch. Of the 3.25 gallons in the first runnings, 2 gallons went to the Common and 1.25 to the Brown.

As soon as I had the first runnings separated I started soaking my specialty grains: 1 pound of Crystal 80 in the Common and 1/2 pound each of brown and chocolate malt in the Brown Ale.

If you’re wondering how I separated the wort into the two kettles, the runnings went into my bottling bucket first and from there into the two kettles so I could keep track of the volumes. (My kettles aren’t marked for volume.)

After sparging with 5 gallons, the 2nd runnings yielded 4.75 gallons @ 10 brix. At this point I evened up the volume by putting 2.75 gallons in the Brown and 2 in the Common. The third runnings (5 Gallons @ 6 brix) went equally in both batches.

There’s no point in boiling grains, so I removed the specialty grains when the wort got to 170F in each of the kettles. The hop schedules were as follows.

Common: 1 oz. Northern Brewer (60 min), 1 oz. Northern Brewer (30 min.), 1 oz. Cascade (10 min.)

Brown: 1 oz. Willamette (60 min), 1 oz. Willamette (20 min.)

After an hour boil and cooling them down to 75, my initial gravities were 15.8 brix for the Common and 12.8 for the Brown. Both were a little higher than I expected, but that’s okay.

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