The bench sheet · Tier 2 — style and ABV
Brew it: a starting point for Imperial Dark Ale
Harpoon Brewery · Imperial Porter · 9.8% ABV, from the approved label. Built for a 5-gallon batch at 72% efficiency.
What the label discloses
StyleImperial Porterfrom the label
ABV9.8%from the label
ArchetypeRobust Porterstyle inference
The starting point
OG1.101
FG1.026
ABV9.8%
IBU—
SRM~30
Grain bill style inference
| 14.75 lb | American 2-row pale malt | 78% |
| 1.5 lb | Munich malt | 8% |
| 1.5 lb | Chocolate malt | 8% |
| 1.25 lb | Crystal 60L | 6% |
Hops style inference
The label doesn't name varieties — these are the archetype's, and the real beer may use anything.
| 1.5 oz | Willamette | 60 min |
| 0.5 oz | East Kent Goldings | 15 min |
Yeast & process style inference
| Yeast | English ale (Wyeast 1968 / S-04) | |
| Mash | Single infusion · 154°F (68°C) · 60 min | |
| Ferment | 66°F (19°C) for 12–14 days | |