Brewing like a Bronze Ager
In the latest podcast episode of Basic Brewing Radio (“Bronze Age Brewing”, aired January 3, 2013) host James Spencer interviewed Ian Hill of the Heritage and Archaeological Research Practice based in the UK, about an ancient “microbrewery” structure discovered by University of Manchester archaeologists at the Bronze Age settlement of Kissonerga-Skalia, near the modern city of Paphos in Cyprus. A link to the story on the Telegraph’s website is below.
Bronze age ‘microbrewery’ discovered in Cyprus
The structure is dated to around 1600 BCE, and included an oven the archaeologists believe was used as a malting kiln, mortars for manual grain crushing, a hearth and clay pots. And you thought your drill-powered malt mill and 60,000-BTU propane burner constituted a bare-bones brewing system …
The conclusion that the structure was a malthouse/brewery came mostly through process of elimination, as Hill explains in the podcast. Some barley was found nearby along with fig seeds, which suggests a barley-based beer, perhaps with some smoked malt flavor as an accidental result of the kiln being contained in such a small space – a theory supported by smoky residue on the walls of the structure. The figs may have been a flavor additive, or may have been added to the wort to start fermentation via the introduction of wild yeast living on the figs’ skin.
Hill went on to explain how in August of 2012, he and some others on his team reconstructed the structure offsite to try malting some grain using the Kissonerga-Skalia setup, then brewed some beer with the grain they malted.
They made several batches with different parameters. Mash thicknesses varied, but the thinnest was 7 liters per kilogram of grain, which works out to 3.36 qts/lb, a thin mash but well within the range of no-sparge “Brew in a Bag” techniques. They doughed in at 70°C (158°F) and kept the mash temperature above 65°C (149°F): pretty typical mash. Although the Bronze Age beer probably was not boiled, Hill’s team boiled theirs to sanitize it. They did not add any hops.
They pitched one batch with crushed figs to emulate the wild fermentation technique speculated for the ancient beer. A second batch was pitched with grapes (also a source of wild yeast) instead of figs. A third batch was fruit-free and pitched with brewer’s yeast as a control. I won’t spoil the results – the podcast is short and fun, and completely worth listening to.
Idea time. I’d like to take the plunge into making an “ancient” beer of my own. I’m a history lover – the older the better – and like the idea of getting in touch with my ancient brewer ancestors by trying out their ingredients and techniques. Patrick McGovern’s book Uncorking the Past: The Quest for Wine, Beer, and Other Alcoholic Beverages is an inspiring read, and I love the work he’s done with Dogfish Head on beers like Midas Touch and Chateau Jiahu. But until now I haven’t had the motivation to get off the fence and dive in with an ancient recipe of my own.
Until now. The figs are speaking to something deep in my soul. Maybe it’s because at Christmas, someone in the family raided the canister of my aunt’s famous Italian fig cookies before I could, and I’ve been craving them ever since. And my recent introduction to historical brewing – Colonial Progress Ale – ended up tasting pretty damn good and has gotten great reviews from friends. I’m feeling ambitious.
So I’m going to brew a Kissonerga-Skalia beer with some smoked malt. I don’t think I’ve got the figs to do an all-wild fermentation, but I would like to try cultivating dregs from a bottle of Midas Touch. And I will use some fig somewhere in the brew for flavor and additional sugar. It sounds like a good spring beer, so that gives me between now and early February to put together a recipe.
In the meantime, I’ll remember a quote from Ian Hill in the podcast that stuck with me: “Archaeologists love their beer, so it’s not a bad thing to find.” Indeed.
Crystal malts in IPA: the wisdom of Mitch Steele
In my recent review of Stone Enjoy By 12.21.12 IPA, I mentioned that I enjoyed it a lot, but was surprised that it had “less melanoidin flavor than I usually want from an IPA.”
Here’s an interesting postscript and mea culpa. I just listened to a Basic Brewing Radio podcast released December 13, in which Mitch Steele, head brewer at Stone Brewing Company and author of a new book IPA: Brewing Techniques, Recipes and the Evolution of India Pale Ale (which I received for Christmas, and it looks like a great read) advocated:
minimizing use of crystal malts in IPA, [which] adds a level of sweetness and malt intensity that [can] kind of mask the hop character … as the beer ages, the crystal malt immediately turns into that dried raisin, fruit character which really knocks the hop character down.
He recommends rye, wheat, or even light Munich malts as a substitute, and says he prefers these malts to crystal in his own IPA recipes. He said that Stone doesn’t often use rye particularly in their beers due to lautering concerns with their brewhouse equipment, but he would like to.
I was always under the impression that crystal was more or less a necessity in IPA, to add exactly the kind of residual sweetness that Steele cautions against. Far be it from me to disagree with him, because he literally wrote the book on IPA, and Stone’s selection of great IPAs speaks for itself. I’ve deduced that Mr. Steele practices what he preaches, and the grain bill for Enjoy By IPA – a beer he had significant creative control over as head brewer – contained little, if any, crystal malt.
It was that sweetness of crystal malt that I was expecting to find in Enjoy By IPA and missing (well, maybe not “missing”, because the beer was spectacular). I incorrectly identified it as a lack of melanoidin flavor, when it was actually a lack of caramel flavor. Caramel flavors come from using stewed, sugary crystal malts (also known as caramel malts; surprise, surprise) in beer. Melanoidins, on the other hand, are the toasty flavors associated with German beers that one gets from decoction mashing and boiling malts such as Vienna and Munich.
Assuming Enjoy By IPA had Munich in its grain bill and not crystal – as per Steele’s own advice – what I was probably tasting was melanoidin. Or at least a subtle, barely detectable background of melanoidin that allowed the hops to take center stage; as opposed to caramel flavors competing with hops for the spotlight in the name of balancing bitter and sweet.
Maybe that’s exactly what Mitch Steele realized, leading him to his decree. If so, I like his style; and I’m going to learn from it. My last IPA had 1 pound of crystal malts compared to 1.5 pounds of Munich, a 2:3 ratio. How much better would the hops taste if I changed that 8 oz of crystal and 2 pounds of Munich (1:4)? Or only 4 oz of crystal (1:8)?
The real tragedy is that December 21 has come and gone, and I won’t be able to find Enjoy By 12.21.12 IPA again. If I do, it’ll be past date. It seems kind of heretical to drink a beer called “Enjoy By 12.21.12” after the date on the label, doesn’t it?
This will be my last post of the year. Happy new year from the Zyme Lord, and I’ll see you in 2013.
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