34C Specialty Beer
Dark Crystal
Grain bill
| Gladfield Light Crystal Malt | 2.8 kg | 44.4% |
| Gladfield Ale Malt | 2.6 kg | 41.3% |
| Gladfield Gladiator Malt | 0.6 kg | 9.5% |
| Dextrose | 0.3 kg | 4.8% |
Adjuncts
| Dextrose (boil) | 300 g @ 40 min |
| Yeast Nutrient | 2 g @ 10 min |
| Whirlfloc | 1 g @ 10 min |
Hop schedule
| Hop | 60 min | 10 min | 0 min | WP 80°C | DH#1 | DH#2 |
|---|---|---|---|---|---|---|
| Nectaron | 10g | 40g | · | · | 50g | · |
| Nelson Sauvin | 10g | · | · | · | 50g | · |
| Motueka | · | · | 10g | · | · | 50g |
| Riwaka | · | · | 30g | 20g | · | 50g |
Yeast
| LalBrew New England (East Coast IPA) | 1 packet |
Tasting notes
About This Beer
Dark Crystal is a name born from a shop mix-up. The grain bill called for 2.8kg of Light Lager Malt; the shop supplied 2.8kg of Light Crystal Malt instead. Rather than reschedule, the decision was made to brew with what arrived — and to name the beer after what it turned out to be.
The result was a first-hand lesson in crystal malt. At 44% of the grain bill, Light Crystal contributes a large proportion of unfermentable sugars that no amount of yeast activity can attenuate. The beer finished at 1.019 — significantly higher than the target — with a sweet, heavy body and a deep amber-to-dark colour that Light Lager Malt would never have produced. The lesson about crystal malt proportions was learned in a single batch and carried forward into every subsequent recipe.
Ingredients
With only 2.6kg of Ale Malt providing most of the fermentable base — less than half the grain bill — 300g of dextrose was added at 40 minutes to compensate for the lack of fermentable sugars. Even so, the crystal malt’s unfermentable character dominated the result.
The hop schedule is NZ-forward across four varieties. Nectaron and Nelson Sauvin bittered at 60 minutes and combined in the first dry hop round at day 3, both known for biotransformation interactions with active yeast. Motueka and Riwaka joined the flameout addition and whirlpool, then came through in the second dry hop round at day 6.
Brew Day
Mash in at 66°C with 16.5L. The mash was held at 66°C for 45 minutes then cooled to 65°C for a further 45 minutes — a longer, stepped approach to maximise fermentability given the crystal-heavy grain bill. Sparged 16L at 78°C. Pre-boil 29L, 75-minute boil, post-boil 27.5L. A slow whirlpool recirculation speed settled the hops into a good filter bed before transfer. 26L into the fermenter, OG 1.064.
Fermentation
Fermented with a single packet of LalBrew New England at 20°C. By day 2, gravity had dropped to 1.035. The first dry hop — 50g Nelson Sauvin and 50g Nectaron — went in at day 3 (SG 1.025) during peak fermentation for biotransformation. Days 3 to 6 the gravity curve flattened, sitting just above 1.020 — the crystal malt’s unfermentable sugars setting the floor. The second dry hop — 50g Motueka and 50g Riwaka — was added at day 6 with SG at 1.020. Temperature was raised to 21°C on day 7, 22°C on day 8 for the diacetyl rest, then pressure was bled and the fermenter was cooled to 12°C by day 15.
The Result
FG 1.019. ABV 5.9%. 22L bottled on 21 February 2024 with 140g priming sugar. The crystal malt made its presence felt in the final beer — sweet, heavy bodied, darker than any APA has a right to be. Not undrinkable, but not the intended beer. The lesson: crystal malt at 5–15% adds character; at 44% it defines — and limits — the beer. That understanding shaped every grain bill that followed.