21A American IPA

SMASH

Single Malt and Single Hop. One malt and one hop with nothing in the way, the clearest way to learn what a hop does from the boil to the dry hop.

Recipe by Matt Paterson Brewed 7 times Owen Paterson, Matt Paterson

Brew day sheet → Open in compare →

What this is

Single Malt and Single Hop. One base malt, one hop variety, nothing else in the grist and nothing else in the kettle.

The best way I’ve found to learn a hop. With no other hop or specialty malt in the way, everything in the glass belongs to that one variety, and running it through every stage shows what it does as bittering, as late-boil flavour, in the whirlpool and in the dry hop. Motueka is a good example: on its own, the herbal Saaz side it’s descended from sits clearly under the lime, citrus and tropical fruit.

Seven brews between June 2023 and September 2026, by Owen and me, across four hops and four base malts.

The frame

The numbers settled with Krush’d Promise in April 2025 and the Golden Weka Ales after it. The varieties are your choice.

Grain6 kg of one pale base malt, 100% of the grist
Hop300 g of one variety
Schedule15 g @ 60 min · 30 g @ 20 · 45 g @ 10 · 60 g whirlpool @ 80°C · 150 g dry hop
YeastTwo packets of a clean ale strain
Mash67.5°C, 60 min
Boil75 min
Result23–24 L at 1.059–1.062, finishing 6.2–6.9%

Half the hop load is the dry hop. The three boil charges climb 15 → 30 → 45 so that bitterness stays moderate while flavour builds, and the whirlpool at 80°C is hot enough to extract but not so hot it strips the aroma. Owen’s Golden Weka ran the same weights with the late charges at 10 and 5 minutes and a 15-minute whirlpool.

How it got there

The two 2023 Superdelic brews started from the League of Brewers kit and put more of the hop into the late boil and less into the dry hop: 50 g dry of 250 g in SMASHadelic, 100 g of 300 g in Shagadelic Baby Yeah, which also ran a 90-minute boil.

Owen’s 2026 Smashadelic took Superdelic back through close to the settled weights, with the bittering charge cut to 10 g, Gladfield Ale Malt, Verdant IPA and the dry hop in on day 4.

Smashatron is the one that bends the rule: 150 g rather than 300, split between Nectaron pellets and Nectaron Cryo. Still one variety, but two products at roughly half the weight, since cryo runs at about double the concentration. Same beer in spirit, different arithmetic.

What has been brewed

BeerMaltHopBrewer
SMASHadelicMaris OtterSuperdelicOwen
Shagadelic Baby YeahMaris OtterSuperdelicMatt
Krush’d PromiseGolden PromiseKrushMatt
Golden Weka AleGolden PromiseMotuekaMatt
Golden Weka AleGolden PromiseMotuekaOwen
SmashatronGladfield American AleNectaronOwen
SmashadelicGladfield AleSuperdelicOwen

Two of the pairings have been brewed by both of us: Maris Otter with Superdelic, and Golden Promise with Motueka. The Golden Weka pair is the closest thing here to a controlled repeat, same malt, hop, weights and yeast.

Choosing what to put in it

The malt should get out of the way. Golden Promise and Maris Otter both bring a little more than a neutral base would, which is a feature at 100% of the grist. A truly neutral malt makes for a thin beer with nothing under the hop. Gladfield American Ale and Ale malt work the same way.

The hop wants to be one you actually want to learn. A SMaSH will expose a hop’s weaknesses as readily as its strengths, and at 13 g/L there is nowhere for it to hide.

Reference build above is Golden Promise with Motueka, chosen because it is the exact 6 kg / 300 g / two-packet spec and both of us have brewed it. Read the malt and hop as placeholders, not prescriptions.

Batches against the style · 21A American IPA

  • ABV, style 5.5% to 7.5%: SMASHadelic (2023-06) 6.6%, Shagadelic Baby Yeah (SMASH) (2023-11) 6.3%, Krush'd Promise (2025-04) 6.2%, Golden Weka Ale (2025-05) 6.9%, Golden Weka Ale (2025-06) 6.0%, Smashatron (2025-07) 6.4%, Smashadelic (2026-09) 6.2%; recipe 6.9%
  • OG, style 1.056 to 1.070: SMASHadelic (2023-06) 1.058, Shagadelic Baby Yeah (SMASH) (2023-11) 1.063, Krush'd Promise (2025-04) 1.059, Golden Weka Ale (2025-05) 1.062, Golden Weka Ale (2025-06) 1.052, Smashatron (2025-07) 1.059, Smashadelic (2026-09) 1.055; recipe 1.062
  • FG, style 1.008 to 1.014: SMASHadelic (2023-06) 1.008, Shagadelic Baby Yeah (SMASH) (2023-11) 1.015, Krush'd Promise (2025-04) 1.011, Golden Weka Ale (2025-05) 1.010, Golden Weka Ale (2025-06) 1.005, Smashatron (2025-07) 1.010, Smashadelic (2026-09) 1.008; recipe 1.010
  • EBC est., style 12 to 28: SMASHadelic (2023-06) 10, Shagadelic Baby Yeah (SMASH) (2023-11) 11, Krush'd Promise (2025-04) 10, Golden Weka Ale (2025-05) 10, Golden Weka Ale (2025-06) 10, Smashatron (2025-07) 9, Smashadelic (2026-09) 10; recipe 10
  • IBU, style 40 to 70: SMASHadelic (2023-06) 65, Shagadelic Baby Yeah (SMASH) (2023-11) 81, Krush'd Promise (2025-04) 102, Golden Weka Ale (2025-05) 92, Smashadelic (2026-09) 56; recipe 92
  • BU/GU, style 0.63 to 1.11: SMASHadelic (2023-06) 1.12, Shagadelic Baby Yeah (SMASH) (2023-11) 1.29, Krush'd Promise (2025-04) 1.73, Golden Weka Ale (2025-05) 1.48, Smashadelic (2026-09) 1.02; recipe 1.48

Lineage

Every brew made from this recipe, oldest first, ending on the canonical version. Differences are computed from the brews themselves rather than written down, so this cannot drift out of step with the archive. 20 of the rows below vary.

SMASHadelic 2023-06 Owen Paterson Shagadelic Baby Yeah (SMASH) 2023-11 Matt Paterson Krush'd Promise 2025-04 Matt Paterson Golden Weka Ale 2025-05 Matt Paterson Golden Weka Ale 2025-06 Owen Paterson Smashatron 2025-07 Owen Paterson Smashadelic 2026-09 Owen Paterson SMASH Canonical
Vital statistics
OG 1.0581.0631.0591.0621.0521.0591.0551.062
FG 1.0081.0151.0111.0101.0051.0101.0081.010
ABV 6.6%6.3%6.2%6.9%6.0%6.4%6.2%6.9%
Batch 23 Lsingle24.5 Lsingle24 Lsingle23 Lsingle19 Lsingle19 Lsingle24 Lsingle23 Lsingle
Total grist 6.3 kg6.0 kg6.0 kg6.0 kg6.0 kg6.5 kg6.5 kg6.0 kg
Total hops 250 g10.9 g/L300 g12.2 g/L300 g12.5 g/L300 g13 g/L300 g15.8 g/L150 g7.9 g/L300 g12.5 g/L300 g13 g/L
Fermentables kg
Maris Otter Pale Ale Malt 6.3 kg100% of grist6.0 kg100% of grist——————
Golden Promise ——6.0 kg100% of grist6.0 kg100% of grist6.0 kg100% of grist——6.0 kg100% of grist
Gladfield American Ale Malt —————6.5 kg100% of grist——
Gladfield Ale Malt ——————6.5 kg100% of grist—
Hops grams · stage split
Superdelic 250 g134 b · 66 wp · 50 dh300 g130 b · 70 wp · 100 dh————300 g85 b · 65 wp · 150 dh—
Krush ——300 g90 b · 60 wp · 150 dh—————
Motueka ———300 g90 b · 60 wp · 150 dh300 g90 b · 60 wp · 150 dh——300 g90 b · 60 wp · 150 dh
Nectaron —————50 g50 b——
Nectaron Cryo —————100 g50 wp · 50 dh——
Yeast
LalBrew BRY-97 PitchedPitched——————
LalBrew Pomona ——PitchedPitchedPitchedPitched—Pitched
LalBrew Verdant IPA ——————Pitched—
Adjuncts & extracts
Whirlfloc half tablet15 min1 g10 min1 g10 min1.4 g10 minhalf tablet10 minhalf tablet10 min—1.4 g10 min
Yeast nutrient half tsp15 min2 g10 min4 g10 min4 g10 minhalf tsp10 minhalf tsp10 minhalf tsp10 min4 g10 min
Protofloc ——————half tsp10 min—