Tuesday, June 13, 2017

Guinness Draught - 1883 Edition

A couple months ago I posted a page featuring links to my favorite recipes for all of the 2015 BJCP styles that I’ve brewed. I was surprised by how many I'd brewed, but it also reminded me that even after 12 years of homebrewing there are plenty of classics that I haven’t, like Irish (Dry) Stout. It seemed a shame to own a stout faucet and not use it to serve the style it was invented for!

Rather than brew something akin to modern Guinness Draught I decided to get weird! I brewed a batch of 1883 Guinness Extra Stout based on a recipe from Ron Pattinson’s fascinating Home Brewer's Guide to Vintage Beer, a sort of distillation of his blog Shut up about Barclay Perkins. My goal was to leave most of the batch at the specified gravity, and dilute a few gallons to create an anachronistic imagining of Guinness Draught as it might have existed in 1883.

The recipe, one of the few in the book not based on actual brewing logs, has a few interesting features. It contains pale malt, but not the other two  grains in the standard Irish Stout formulation. It is from just after the Free Mash Tun Act of 1880, well before Guinness took advantage of the end of adjunct prohibition. As a result it calls for black malt instead of unmalted roasted barley (which they changed to around 1930). It also includes amber malt for a richer flavor than flaked barley (added around 1950). Hop additions follow many 19th century recipes, copious amounts of low alpha acid varieties towards the start of the boil. I made two minor tweaks to the recipe as written, increasing the black malt from 5.56% to 6.9% to prevent the diluted version from being too pale and subbing in Wyeast Irish Ale for Whitbread Ale.

I ran off 5.5 gallons of the resulting 1.075 wort into a fermentor (that portion is bottle-conditioning currently). For the draught-strength I ran off 3 gallons of the chilled wort into a separate fermentor, and diluted it to 1.047 with two gallons of distilled water. That is what is now sitting on beer gas. Guinness didn't start using nitrogen until 1959, so Ron wasn’t a fan of my plan:

This was my first batch using a Halo pH Meter sent by the kind folks at Hanna Instruments. The biggest benefit of this “Beer Analysis” version is that the hardy titanium body can take pH readings directly at mash temperature without cooling a sample! You do need to add .2-.35 to the reading to adjust for the influence of the elevated temperature. That’s about what I found with the Halo reading 5.25 at mash temperature and 5.39 on a chilled sample.

The time-savings of  not chilling samples makes up for the added hassle of  pairing the Halo with my phone. The point of co-dependent smart-devices is to leverage the existing hardware, but the Halo costs more than twice as much as my Milwaukee MW102. The app would be more valuable if there was a need to track pH changes during the mash, but I don't have an easy way to mount the meter and once the pH stabilizes there really isn't a need to track small changes.

I’m interested to see how long the probe/electrode lasts with the exposure to high temperature. It includes an extendable cloth junction that can be pulled out to refresh it. However, Hanna does not sell replacement probes so after the expected 12-18 month lifespan it’ll be another $225 rather than $43 for a replacement probe for my MW102. Might be worth expensing it to Sapwood Cellars, but I imagine not an annual purchase for most homebrewers!

My preference is for a slightly higher mash pH on dark beers, to prevent the roasted malts from tasting acrid. That said, my old friends at Modern Times aim for a slightly lower final pH for batches of Black House destined for nitro to replace the acidity otherwise provided by carbonic acid. When the pH reading came in a bit lower than I wanted I dosed the mash with chalk dissolved in carbonated water (using a carb cap) - the same chemical reactions are behind acid rain eating away at limestone. I first read about this technique on Braukaiser. The issue with adding chalk directly to the mash is that it doesn’t dissolve at typical mash pH like other water salts. While it likely helps buffer the boil and final pH, baking soda or slaked/pickling lime are better choices for direct mash tun additions. However, dissolving chalk is a useful technique if you want to add calcium rather than sodium along with carbonate.

Guinness Draught 1883

Smell – The nitro-pour subdues the aromatics, but what comes through is pretty expected: fresh grainy-roast, some fresh yeasty notes, and a hint of earthy hops.

Appearance – Shows off the classic swirling, cascading bubbles that Guinness features so prominently in their advertising. Settles into a velvety, half-inch off-white head. A pure sheet of lacing trails each sip. Will look even pretty after a few more weeks on tap as nitrogen continues to slowly dissolve and the slight haze hopefully drops out.

Taste – The first sip has really firm bitterness from hops and roast. The bready maltiness picks up, more than in the classic Irish Stouts, but not enough to bring English stouts to mind. As my first glass winds down the bitterness has tamed to a crisp finish. Has a lingering “dirtiness” from the Fuggles I presume.

Mouthfeel – The low carbonation certainly helps to provide some fullness that wouldn’t be there with high carbonation. The texture of the head on each sip helps as well.

Drinkability & Notes – A true summertime stout. Light, smooth roast, and refreshing bitterness like an iced coffee. Easy to pour a second glass.

Changes for Next Time – It’s a rare beer that I don’t have much to change for next time. I might go all EKGs, or at least at the 60 minute addition, to clean and brighten it up a bit.

Recipe

Batch Size: 5.00 gal
SRM: 23.8
IBU: 43.8
OG: 1.047
FG: 1.014
ABV: 4.3%
Final pH: 4.31
Brewhouse Efficiency: 67%
Boil Time: 120 mins

Grain
--------
82.8% - 7.5 lbs Crisp Gleneagles/No. 19 Maris Otter
10.3% - .95 lbs Muntons Amber
6.9% - .625 lbs Simpsons Black Malt

Mash
-------
Sacch I - 40 min @ 152F
Sacch II - 20 min @ 160F

Hops
-------
1.00 oz Fuggle (Pellets, 3.57 % AA) @ 90 min
1.00 oz Fuggle (Pellets, 3.57 % AA) @ 60 min
1.00 oz East Kent Golding (Pellets, 4.80% AA) @ 30 min
Scaled all three hop additions to account for the higher utilization assumed for a low gravity beer.

Other
-------
1.4 g Chalk @ mash
0.5 Whirlfloc @ 5 min

Calcium
Chloride
Sulfate
Sodium
Magnesium
Carbonate
70
32
54
15
10
130

Yeast
-------
Wyeast 1084 Irish Ale

Notes
-------
Amounts above scaled to be brewed as a 5 gallon undiluted batch. 

5/6/17 4 L 1.034 starter with 6 week out yeast.

Dissolved 17 g of chalk in 30 oz of filtered water. Chilled and carbonated to get it to dissolve.

pH measured 5.19. Added .3 cup of the resulting saturated liquid to the mash. pH measured 5.25 at mash temperature, 5.39 pH when chilled. Both with Halo.

Chilled to 66F.

Diluted 3 gallons with 2 gallons of distilled to 1.047. Pitched with 1.5 L of starter.

Left at 67 F to get started. Got up to 70F overnight, moved to fridge, slowly brought back to ~67F actual temperature to ferment.

5/19/17 Kegged the diluted half.

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Tuesday, June 6, 2017

2.3% ABV Session NEIPA

Recirculating through the hop filter.
I received an email a couple month ago from a homebrewer looking for advice on a 1% ABV New England IPA. It got me thinking about how light I could push a beer that still scratched my hop-itch. All else equal, I prefer beers with less alcohol so I can drink more, especially when it is hot out. I’ve brewed a few low-alcohol hoppy beers over the years (Wheat-based at 2.1% and Vienna-based at 3.6%), but it seemed worth revisiting. Rather than make a 1% near-beer, I decided 2% ABV was a more plausible goal!

While dextrins aren’t a major mouthfeel driver (study, Brulosophy, Karnowski), lower attenuation allows more malt to be added for the same volume of wort. Below 3% ABV is where the simple lack of malt begins to really show, especially in a style like this that isn’t buttressed by specialty malts. Think of it as the opposite of a big DIPA where you might substitute sugar for base malt to prevent the beer from becoming too malty. To make an absurdly-unfermentable wort I opted for equal parts Maris Otter (for more malt flavor pound-for-pound than my usual Rahr Brewer’s 2-row) and dextrin malt (Weyermann Carafoam).

Dextrin malts vary substantially depending on the maltster. The two most common are from Briess and Weyermann:

Briess Carapils is a true glassy caramel/crystal malt, albeit one that isn’t roasted enough to develop the color or flavor associated with darker caramel malts. The problem is that the dextrins created during the stewing process are converted to fermentable sugars if mashed with enzymatic base malt (light crystal/caramel malts don’t substantially affect attenuation, further discussion). Although if they were steeped alone, that would be another story.

Weyermann Carafoam (Carapils outside the US) is akin to chit malt, high in protein and under-modified. It is mealy/starchy so it too is converted into fermentable sugars when mashed, but would be unsuitable for steeping. Weyermann suggests it can be used as up to 40% of the grist. I hoped the protein contribution would make up for the well-modified English base malt while preventing the beer from tasting too biscuity.

Omega British VI performed a brew-in-a-bag mash given the small quantity of grain. I mashed in at 165F to quickly denature the beta amylase responsible for creating most of the highly-fermentable maltose. Efficiency was a bit better than expected and it reached 1.030 instead of 1.028.

One of the takeaways from my recently submitted September BYO Advanced Brewing article (subscribe) comparing the mineral content of water to the beer brewed with it was that many of the flavor ions increase substantially. Much of that is from the grain, and using less grain suggests increasing the mineral additions. As a result, I increased my chloride target to boost mouthfeel.

I had some El Dorado in the freezer, and decided this was a good first batch to brew with them. I decided to pair with an equal amount of Simcoe to cut through the fruitier notes that El Dorado brings – often described as watermelon or strawberry. I used the new 400 micron hop filter I bought on a whim to hold the single flame-out addition, recirculating the wort through them.

For yeast I decided to try out Omega British V, which they compare to Wyeast 1318. I was hoping the grain and hot mash would result in ~50% apparent attenuation rather than the standard 71-75%. Despite all of my efforts the yeast still achieved a surprising 60% attenuation!

Session-Strength Session NEIPA

Smell – It smells like beer and not wort or hop tea! The hops provide an interesting mix of fruit (the power of suggestion says watermelon) and resin. Not much citrus or juice. Hop aroma would have been boosted by a keg hop. Not much else going on, but it doesn’t raise any flags given the style is all about hops.

Drinking Session IPA before mowing.
Appearance – Passes the eye test as well. Not too pale thanks to the Maris Otter. Appropriate haze. Head looks about right too, solid, white, with good-but-not-great retention.

Taste – The malt flavor is almost there, and then it isn’t, falling flat and fading too quickly. Doesn’t come off as excessively bready English-malty though. The bitterness was harsh when I tapped the keg, mostly because I was drinking it nine days after brewing! A week later, now that the hop matter has dropped out of suspension, it has mellowed to just a little sharp. No hint of alcohol...

Mouthfeel – Despite the chloride, Carafoam, and low attenuation the body isn’t fooling anyone. The mid-palate is more Bud Light than Julius, seltzery rather than pillowy. I remember the wheat-based batch having better body despite the same 1.030 original gravity.

Drinkability & Notes – Crisp, crushable, hoppy barley water. I like it, but it’ll need some tweaks to dupe anyone into thinking it is above 4%, let alone 6%!

Changes for Next Time – A small addition of honey malt would help the malt flavor and add sweetness to balance the hops. I’d probably swap half of the Carafoam for oats as well to bring the body up. Might chill to 200F before adding the hop-stand addition to reduce the bitterness.

Recipe

Batch Size: 6.00 gal
SRM: 3.2
IBU: 48.6
OG: 1.030
FG: 1.012
ABV: 2.3%
Final pH: 4.89
Brewhouse Efficiency: 68%
Boil Time: 30 Mins

Malt
------
50.0% - 3.5 lbs Weyermann Carafoam
50.0% - 3.5 lbs Crisp Floor-Malted Gleneagles/No. 19 Maris Otter

Mash
-------
Sacch Rest - 45 min @ 165F

Hops
-------
2.00 oz El Dorado (Pellets, 14.00 % AA) @ Flame-out (30 min Hop Stand)
2.00 oz Simcoe (Pellets, 13.00 % AA) @ Flame-out (30 min Hop Stand)
2.00 oz El Dorado (Pellets, 14.00 % AA) @ Brew Day Dry Hop
2.00 oz Simcoe (Pellets, 13.00 % AA) @ Brew Day Dry Hop
2.00 oz El Dorado (Pellets, 14.00 % AA) @ Dry Hop Day 3
2.00 oz Simcoe (Pellets, 13.00 % AA) @ Dry Hop Day 3

Other
-------
9.00 g Calcium Chloride @ mash
4.50 g Gypsum @ mash
1.00 tsp 10% Phosphoric Acid @ mash
0.50 Whirlfloc @ 5 min
0.50 tsp Wyeast Nutrient @ 5 min

Calcium
Chloride
Sulfate
Sodium
Magnesium
Carbonate*
135
160
100
10
5
45
*Do not increase if your water is lower in carbonate.

Yeast
-------
Omega OYL-011 British Ale V

Notes
-------
Brewed 5/19/17

BIAB with all of the salts and the acid, 3 gal each distilled, and DC tap. 5 gallons of 1.035 after removing the bag. Diluted with 1 gal each distilled and DC tap. That knocked the temperature down to 140F, but the enzymes should have been mostly denatured.

Brought to a boil for 30 minutes. Turned off the heat and added the hops for a 30 min stand with the wort recirculating through the hop filter.

Chilled to 70F, added first dose of dry hops to fermentor during run-off, pitched the yeast directly from the package, left at 64F to ferment.

5/22/17 Added second dose of dry hops.

5/29/17 Kegged, no keg hops at this point.

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