Black Ops
Batch23 L
Boil90 min
IBU82.3
SRM41.7
OG1.079
FG1.02
ABV7.8%
Style Details
| Name | Cat. | OG Range | FG Range | IBU | SRM | Carb | ABV |
|---|---|---|---|---|---|---|---|
| Imperial Stout | 20 C | 1.075 - 1.115 | 1.018 - 1.03 | 50 - 90 | 30 - 40 | 0 - 0 | 0 - 0 % |
Fermentables
| Name | Amount | % |
|---|---|---|
| Pale Ale | 6.831 kg | 80.54 |
| Demerara Sugar | 502 g | 5.92 |
| Crystal Medium | 286 g | 3.37 |
| Crystal Dark | 286 g | 3.37 |
| Chocolate | 232 g | 2.74 |
| Black | 232 g | 2.74 |
| Roasted Barley | 113 g | 1.33 |
Hops
| Name | Amount | Time | Use | Form | Alpha % |
|---|---|---|---|---|---|
| Summit | 35.5 g | 90 min | Boil | Pellet | 15.9 |
| Comet | 29.6 g | 60 min | Boil | Pellet | 8.6 |
| EK Goldings | 53.2 g | 0 min | Boil | Pellet | 6.8 |
Miscs
| Name | Amount | Time | Use | Type |
|---|---|---|---|---|
| CRS/AMS | 5.4 g | 0 min | Mash | Other |
| CRS/AMS | 7.6 g | 0 min | Sparge | Other |
| Yeast Nutrients | 2.9 g | 10 min | Boil | Other |
| Polyclar Brewbrite | 4.7 g | 10 min | Boil | Other |
| Irish Moss | 2.9 g | 10 min | Boil | Other |
Yeast
| Name | Lab | Attenuation | Temperature |
|---|---|---|---|
| BEOIR | 74% | 0°C - 0°C |
Mash
| Step | Temperature | Time |
|---|---|---|
| Temperature | 67°C | 70 min |
| Mash Out | 75°C | 10 min |
Notes
21.4L mash water.
Sparge to 25.5L boil volume
90 min boil to give 21L post-boil volume
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Brewer's Notes
This beer took Silver at both the 2023 ACB competition and also the 2024 UK Nationals. It is a slight variant on an AG kit from Cross My Loof (Black Ops) – yeast changed (from 1 x SO-4 to 2 x Beoir) and I added 1ml Amyloglucosidase enzyme as the fermentation stuck a bit high. This led to a very low FG for such a big beer and a higher than expected ABV, but it has smoothed out nicely in the several months since bottling.