Hey Brewmaster, ever talk to a real brewmaster?
Back to Ask the Brewmaster.
As a matter of fact, I had an interesting evening a few weeks ago with the
brewmaster from the Boston Beer Company,
makers of Sam Adams Boston Lager. Grant Wood was the invited speaker for an
evening tasting at an east coast aerospace conference. He brought along a generous
sampling of their brews, along with fairly technical discussion of the brewing
process. Grant is their pilot brewer, testing out new recipes on a pre-commercial
scale. I quietly sat back trying to capture as much as I could.
Sam Adams Boston Lager is made using Harrington two-row malt, including some
crystal malt and Munich malt. They have four regional breweries, which treat
their local water with calcium chloride. They use an interesting decoction process.
About 20% of the mash is heated to 122°F for 20 minutes, and then is ramped
up to boiling. The larger portion of the mash is also started at 122oF. The
two are then blended to create the main mash temperature of 158°F. This
creates a fairly dextrin-rich wort. The mash is sparged into the boiling kettle.
The boiling process is accompanied by an addition of Perle hops to get 30 IBUs,
and four subsequent additions of Hallertau Mittelfrüh.
Fermentation is done at 58°F, using their own proprietary yeast. . Primary
fermentation goes for 7 days, at which point, it is dry-hopped with more Hallertau
Mittelfrüh hops. The wort is also kräusened at this point with 15%
fresh wort. It is then given another 7 days at 58°F. Next, the wort is chilled
to 35°F, where it is lagered for 21 days. This abrupt chilling is used to
halt fermentation, and maintain the characteristic body of Boston Lager. Finally,
the beer is filtered and bottled.
As Grant went though his discussion, we sampled a number of brews. First was
their Light beer, which, like the ad says, has shockingly good taste, at least
for a light beer. The color, interestingly, is the same as their flagship Boston
Lager, which was the second beer. Next came the Boston Ale, which was fairly
similar, but had the characteristic fruiter flavor typical of an ale, and hop
aroma from East Kent Golding hops. I also noted some diacetyl too. (He claims
they have a maximum limit of 0.018 ppm.) Oktoberfest came next, with a pleasantly
malty taste. We capped off the evening with Cream Stout, a very sweet desert
beer.
Some things to look for in the near future from Boston Brewing include a Hefeweizen,
and a return of an old favorite, their Scotch ale. As I recall, the Scotch ale
was pretty good, so pick up a six-pack if you see it.
Vital Statstics for Boston Beers
Style |
Starting Gravity |
Final Gravity |
Bitterness, IBU |
Color, SRM |
Hop Aroma |
Sam Adams Light |
1.035
|
1.007
|
10
|
8
|
None
|
Boston Lager |
1.045
|
1.011
|
30
|
8
|
Medium
|
Octoberfest |
1.055
|
1.014
|
25
|
12
|
None
|
Cream Stout |
1.055
|
1.018
|
25
|
40
|
None
|