And another one,
Imperial Porter :"A 10% reimagining of our London Porter with added Invert Sugar, Treacle and Glucose" But are the new lords and masters a bit less comfortable with full disclosure of recipes?
Scale that down directly from 260hl to 20l and you get :
5.10 kg (64.8%) UK pale malt (Bairds)
910 g (11.6%) glucose
874 g (11.1%) UK crystal - light (60L-ish?)
619 g (7.9%) brown
182 g (2.3%) treacle (see discussions elsewhere for how it's similar to but not the same as molasses)
109 g (1.4%) UK chocolate malt
73 g (0.9%) Invert sugar #1 (Lyle's golden syrup will do or make your own)
However they will be getting much better efficiency than a typical homebrew setup. If we assume 65% brewhouse efficiency and a yeast such as Imperial A09 Pub (or Fullers yeast harvested from bottles of 1845 or a cask) managing 67.5% attenuation then we need to multiply by a fudge factor to end up with a grain bill that looks like this for OG 1.101 and 10.0% ABV (imperial is for 5 US gallons, metric for 20 litres) :
6820g 14lb 4oz (64.8%) UK pale malt
1217g 2lb 9oz (11.6%) glucose
1168g 2lb 7oz (11.1%) UK crystal 60L
828g 1lb 12oz (7.9%) brown malt
243g 8.1oz (2.3%) Lyle's treacle
146g 4.9oz (1.4%) UK chocolate malt
97g 3.3oz (0.9%) Invert sugar #1/Lyle's golden syrup
Tweak the numbers to match your equipment. Yeast nutrient is probably a good idea.
Personally I'm more interested in the regular London Porter at 5.4%.
The website confirms the ingredients as pale, crystal, brown, chocolate, and Henry has revealed later in that thread that the proportions are almost the same "78% - London Porter 74% pale ale to try and max OG, 13.5-14% Crystal and 9-10% Brown malt, 1.5% Chocolate malt for both." Which at 70% efficiency and 71% attenuation looks like 1.056 OG, 1.016 FG and 5.4% ABV of :
4500g 9lb 6oz (74.5%) UK pale malt
850g 1lb 12oz (14.1%) UK crystal 60L
600g 1lb 4oz (9.9%) brown malt
90g 3oz (1.5%) UK chocolate malt
The website says the normal porter is 37IBU of 100% Fuggles, which would be 69g (2oz) of 4.5% Fuggles at 60 minutes. But don't get too hung up on that - use Willamette, WGV, Savinjski, anything similar. It's possible they're adding the equivalent of 15g (0.5oz)or so as a late copper addition, I'd probably do that.
It's not clear what the hopping is on the imperial porter, I'd assume it's Fuggles again but maybe a bit more, like 100g (3oz) equivalent?
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