21B Specialty IPA: Red IPA

West Coast Red IPA

Four iterations of a NZ-inflected red IPA. The grain bill settled in 2024; the hops are still the variable.

Recipe by Matt Paterson Brewed 3 times Matt Paterson

Branches: Fresh Hop Red IPA

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What this is

A New Zealand–inflected red IPA, brewed four times between April 2024 and May 2026. It is not a West Coast IPA with crystal malt added. The malt bill is doing real work: Aurora and Shepherds Delight build colour and bready depth, Toffee carries mouthfeel, and the hop schedule is pitched to sit over that rather than bury it.

Target is 1.060 to 1.011 for 6.4%, dry enough that the red malt reads as structure and not sweetness.

The spine and the variable

Three things have not moved across any brew in this lineage: American Ale at 4.2 kg, Shepherds Delight at 0.4 kg, and a 60-minute bittering charge of 25 g. Everything else has been under test at some point.

The grain bill converged early and then stopped. Vienna came down 1.6 → 1.3 → 1.0 kg over the first three brews and has stayed at 1.0 since. The accent-malt slot was searched once (nothing, then Redback, then Toffee) and settled on Toffee. Rye was carried through the first three brews at 0.2 kg and then dropped without being missed.

That leaves the hops as the live variable, and Eclipse Wheat as the one grain still being adjusted. If you want to change something, change the hops. The malt bill is finished.

How it got here

West Coast RIPA I (April 2024) was Mosaic and Riwaka over a heavier Vienna load, 1.063 to 1.012 for 7.0%. Good, but the malt sat forward of the hops.

II (June 2024) pulled Vienna back to 1.3 kg and tried Redback in the accent slot. First appearance of Eclipse Wheat, at a token 50 g.

III (September 2024) is where the grain bill landed: Vienna to 1.0 kg, Redback out and Toffee in, Aurora up to 0.4 kg, Eclipse Wheat doubled to 100 g. Every subsequent brew uses this bill.

Fresh Hop Red IPA (March 2026) forked off III for the harvest and is documented separately, but two things came back from it. Pacific Jade took over the bittering slot from Mosaic, and Krush pellets came in alongside the fresh hops and stayed. Both are in the recipe above.

Red IPA (May 2026) is the current canonical. Robin’s first solo all-grain batch, brewed with assistance, and the fourth iteration of this recipe. The hop schedule was rebuilt around Krush with Mosaic and Simcoe in support, split evenly across a 10-minute addition, a 75°C whirlpool and a day-3 dry hop. Eclipse Wheat came down to 70 g. Hit 1.060 to 1.011 exactly.

Where it goes next

Eclipse Wheat at 70 g against 100 g is the open question, and one more brew should close it. Beyond that the interesting ground is hop selection, not schedule: the 25/60/100 g split across boil, whirlpool and dry hop has been stable enough across two brews to treat as the frame.

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. 21 of the rows below vary.

West Coast RIPA I 2024-04 Matt Paterson West Coast RIPA II 2024-06 Matt Paterson West Coast RIPA III 2024-09 Matt Paterson West Coast Red IPA Canonical
Vital statistics
OG 1.0631.0591.0641.060
FG 1.0121.0131.0121.011
ABV 7.0%6.2%7.0%6.4%
Batch 23 Lsingle25 Lsingle25 Lsingle23 Lsingle
Total grist 6.7 kg6.75 kg6.6 kg6.37 kg
Total hops 330 g14.3 g/L330 g13.2 g/L300 g12 g/L225 g9.8 g/L
Fermentables kg
Gladfield American Ale Malt 4.2 kg62.7% of grist4.2 kg62.2% of grist4.2 kg63.6% of grist4.2 kg65.9% of grist
Gladfield Vienna Malt 1.6 kg23.9% of grist1.3 kg19.3% of grist1.0 kg15.2% of grist1.0 kg15.7% of grist
Gladfield Shepherds Delight Malt 0.4 kg6% of grist0.4 kg5.9% of grist0.4 kg6.1% of grist0.4 kg6.3% of grist
Gladfield Aurora Malt 0.3 kg4.5% of grist0.3 kg4.4% of grist0.4 kg6.1% of grist0.4 kg6.3% of grist
Gladfield Rye Malt 0.2 kg3% of grist0.2 kg3% of grist0.2 kg3% of grist
Gladfield Redback Malt 0.3 kg4.4% of grist
Gladfield Eclipse Wheat Malt 0.05 kg0.7% of grist0.1 kg1.5% of grist0.07 kg1.1% of grist
Gladfield Toffee Malt 0.3 kg4.5% of grist0.3 kg4.7% of grist
Hops grams · stage split
Mosaic 160 g60 b · 20 wp · 80 dh160 g60 b · 20 wp · 80 dh100 g40 b · 10 wp · 50 dh50 g10 b · 15 wp · 25 dh
Riwaka 170 g50 b · 20 wp · 100 dh170 g50 b · 20 wp · 100 dh100 g35 b · 15 wp · 50 dh
Nectaron 100 g35 b · 15 wp · 50 dh
Pacific Jade 25 g25 b
Krush 100 g20 b · 30 wp · 50 dh
Simcoe 50 g10 b · 15 wp · 25 dh
Yeast
LalBrew BRY-97 PitchedPitchedPitched
Froth Tech Vape FT02 Pitched
Adjuncts & extracts
Yeast Nutrient 2 g10 min2 g10 min2 g10 min5 g10 min
Whirlfloc 1 g10 min1 g10 min1 g10 min1 g10 min
Aromazyme manufacturer dosefermentation