Friday 19 March 2010

Colouring Porter

It's been a while since I mentioned Porter. At least a day or two. time to return to one of my favourite topics: Porter grists. 

A method for obtaining the colour and flavour of Porter at the same time as using a grist mostly consisting of pale malt was eagerly sought. The pressure on costs caused by increased taxation during the Napoleonic Wars and the knowledge that pale malt was a cheaper way of getting extract than brown malt had prompted the change in Porter grists.

"Porter. A malt liquor of a deep brown colour and a peculiar flavour, which it derives from the malt used in brewing, it being highly dried in the malt-kilns. This, at least, was the composition of Porter until lately, when it has been found that the same colour and flavour may be communicated to liquor brewed from a mixture of brown and pale malt, by the addition of certain colouring matters, which being obtained from burning the same substance that causes the brown colour of the highly dried malt, produces a similar liquor it a far less expence of materials than when brown malt alone is used; because the pale malt yields a far greater proportion of saccharine matter than the brown, in which a share of the saccharum is burnt up in the kiln only for the purpose of producing a colour and flavour which may so easily be communicated to the beer of pale malt by a small quantity of burnt sugar."
“Pantologia: A new cyclopaedia Vol IX”, 1813, pages (doesn’t have page numbers)

For a while, when sugar was permitted for colouring, a sort of caramel was used. However the rules kept changing and sometimes brewers had to use concentrated wort instead.

"The colouring for porter is made by boiling coarse brown sugar in an iron pan with a small quantity of water, keeping it constantly stirred up; it is then set on fire and burned a few minutes, to give it the colour and flavour which might be obtained from brown malt. The fire is extinguished by putting on a cover. The residuum is now mixed up with water to the consistence of treacle, and makes the colouring, which is put to the beer while working in the square, and gives it the same colour and flavour it would have derived from being brewed from brown malt. Some brewers, to avoid the censures of the public, who restrain them to the use of malt and hops alone, concentrate a quantity of their best first wort, by boiling in the iron pan, and burn this instead of sugar, from which it does not materially differ.

A patent has been lately taken out by M. De Roche for colouring porter by the skins and husks of malt roasted to a coffee colour, and mixing them with the malt before mashing; or by infusing them in the water before brewing ; or by mixing them with the beer. This would undoubtedly give colour ; but we have some doubts of its communicating the flavour which is required."
“Pantologia: A new cyclopaedia Vol IX”, 1813, pages (doesn’t have page numbers)

Ultimately it was an improvement of De Roches roast husks, patent malt, which became the main Porter colourant.

7 comments:

StuartP said...

On the subject of porter, is it too early for a Papazian Cup entry?
I've got a cracker.

Ron Pattinson said...

Stuart, it's never too early for a Papazian Cup entry.

StuartP said...

Allow me to quote:-
'The most popular beer for a period was called 'Porter Beer' which was simply a blend of Stout and the ordinary mild ale of the day. It received its name because it was widely drunk by the London porters who found the Stout alone too heavy.'
The Boots Book of Home Wine Making and Brewing, B.C.A. Turner.
Now, let that be the last word on the issue.

Gary Gillman said...

The Pantalogia description of porter brewing is from 1813 and is a sophisticated look at the subject. You really get a sense of moving away from the 1700's here, yet at the same time, the discussion sheds much light on 1700's methods.

Gary

Ron Pattinson said...

Gary, yes it's fascinating. And quite funny that it was published at one of the few times sugar colouring was legal.

Ron Pattinson said...

StuartP, that's a great entry. There's the odd element of truth in there, carefully conealed by the utter bollocks.

Gary Gillman said...

The part that resonated with me is the blending of strong and mild beer (beer of course, not ale - although we have seen earlier that somewhat oddly, it was old ale and young beer (porter) that were blended and aged to make a country-style porter).

In Peter Mathias' landmark study of the brewing industry 1700-1830, he makes the point, by reference to "rest books" of 1700's London breweries, that the greater part of the inventories always was mild beer. I recall Graham Wheeler opining here that porter always was a blend of mild and aged porter (or mild and something). I think Mathias' comments support that.

At the same time, it is easy to envision that some brewers aged and sold their own matured porter in toto, or some publicans did by starting butts and there is evidence that many publicans did just that.

And Poundage stated that dealers in stale beer supplied the article in some cases to publicans. Probably there were many methods of achieving a balanced, aged flavour, which I feel I encountered recently in the form of the draft Sinebrychoff at The Gingerman in New York. It was, I later learned from the website of the pub, unfiltered, differing therefore from the bottled version. I would love to know exactly how the palate of the draft beer was achieved.

Gary