Dark · BJCP 20C
Imperial Stout
A black, rich stout with Abbey, chocolate and roasted barley; brown sugar adds body while staying drinkable.
- Dark chocolate
- Coffee
- Caramel
Origin: Belgium / EnglandDifficulty: IntermediateReady in: 5 weeks❄ Needs chiller
Recipe source: Castle Malting® — Imperial Stout · view original ↗ (scaled to 20 L at 72% efficiency)
Against BJCP 20C guidelines
Stats calculated from ingredients (Tinseth · Morey) — real results depend on efficiency and water.
- OG
- 1.061
- FG
- 1.013
- ABV
- 6.2%
- IBU
- 28
- SRM
- 34.1
- EBC
- 67
Malt & sugar
| Malt & sugar | Amount | Share |
|---|---|---|
| Pilsner malt | 6.7 kg | 59% |
| Biscuit malt | 2.2 kg | 19% |
| Chocolate malt | 0.9 kg | 8% |
| Crystal 15L | 1.1 kg | 10% |
| Roasted barley | 0.2 kg | 2% |
| Đường candi / đường kính | 0.2 kg | 2% |
| Σ | 11.3 kg |
Hops
| Hops | Amount | Use | Time |
|---|---|---|---|
| East Kent Goldings 5.5% AA | 86 g | Boil | 50 min |
| East Kent Goldings 5.5% AA | 44 g | Boil | 10 min |
Yeast
SafAle S-04 · 4 pack(s) (11,5 g) · Ferment at 18–20°C
Water (estimate for an All-in-One brewer)
- Total water
- 55 L
- Mash water
- 33.3 L
- Sparge water
- 21.7 L
- Pre-boil volume
- 45 L
Estimated ingredient cost for this batch
Reference retail prices from ABV Beer Shop · 24/09/2026
- Cost of what you use
- ₫1,227,000
- Retail purchase
- ₫1,385,000
- Per litre
- ₫30,700
- Per 330 ml glass / bottle
- ₫10,100
Show cost per ingredient
| Ingredient | Amount | Reference price | Cost of what you use | Retail purchase |
|---|---|---|---|---|
| Pilsner malt | 6.7 kg | Weyermann Pilsner · ₫46,100/kg | ₫308,870 | ₫322,700 (7 kg) |
| Biscuit malt | 2.2 kg | Weyermann Abbey · ₫54,600/kg(equivalent) | ₫120,120 | ₫136,500 (2.5 kg) |
| Chocolate malt | 0.9 kg | Weyermann Carafa I · ₫67,800/kg(equivalent) | ₫61,020 | ₫67,800 (1 kg) |
| Crystal 15L | 1.1 kg | Weyermann Carahell · ₫60,300/kg(equivalent) | ₫66,330 | ₫90,450 (1.5 kg) |
| Roasted barley | 0.2 kg | Weyermann Roasted Barley · ₫65,800/kg | ₫13,160 | ₫32,900 (0.5 kg) |
| East Kent Goldings | 130 g | Styrian Goldings (Celeia) · ₫109,100/100 g(equivalent) | ₫141,830 | ₫218,200 (2 × 100 g pack) |
| SafAle S-04 | 4 pack(s) | SafAle S-04 11,5 g · ₫129,000/pack | ₫516,000 | ₫516,000 (4 pack(s)) |
Not included (buy elsewhere, no reference price): Đường candi / đường kính.
Retail purchase rounds hops and spices up to 100 g packs and malt up to 0.5 kg — leftovers keep for the next batch. Excludes power, water, CO₂ and cleaning chemicals. Prices may change.
Mash
- 62°CBeta rest (drier beer)45 min
- 72°CAlpha rest (iodine test)20 min
- 78°CMash-out2 min
Boil
Boil 60 minutes
Carbonation
2.4 vol CO₂
Fermentation
- 16°CPitch & primary fermentation2 days
- 18°CFree rise to finish5 days
- 8°CDrop to 8°C, settle / harvest yeast1 days
- 1°CCold conditioning12 days
Tips for success
- Called 'imperial' but only 6.5% — much lighter than BJCP Imperial Stout (8–12%).
- Converted from Castle Malting's (Belgium) 100 L recipe — Château malts replaced with equivalents.