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Brut IPA is the style that emerged from the San Francisco craft brewing scene in 2018 and captured exactly the kind of technical brewing challenge I find most interesting, using amyloglucosidase enzyme to achieve near-complete fermentation at OG 1.065+ and produce a beer so dry it reads like champagne. I brewed Brut IPA during its peak popularity and it remains one of the most technically interesting experiments I’ve done, even though the style has largely faded from commercial prevalence since 2020.
Brut IPA style guide: bone-dry enzyme-fermented IPA
Style overview: Brut IPA is a modern American IPA sub-style created by Kim Sturdavant at Social Kitchen & Brewery (San Francisco) in 2018, characterised by near-zero residual sugar (hence “Brut,” like Brut Champagne), very high attenuation achieved through amyloglucosidase enzyme addition, and a bone-dry finish that allows hop aromatics to be exceptionally vivid without sweetness interference. BJCP does not have a formal Brut IPA category; it is classified as a specialty IPA. Key characteristics: OG: 1.060–1.075. FG: 0.998–1.004 (extremely dry, below water density in some cases). ABV: 6.0–7.5%. IBU: 25–40 (lower than typical IPA because the bone-dry finish amplifies perceived bitterness, less IBU is needed for the same bitterness perception). SRM: 2–6 (extremely pale, nearly water-white). Flavour profile: Brut IPA impression: bone-dry finish (champagne-like), intense hop aroma (the dry finish makes the hop character exceptionally vivid because nothing competes with it), no malt sweetness whatsoever (the enzyme converts all starch to fermentable sugars), very light body, high carbonation. The dryness is the defining experience, it amplifies hop aromatics in a way that standard IPA cannot match because residual sweetness always competes with hop bitterness and aroma. Grain bill for 20L: American 2-row: 5.5 kg (very pale, very clean). Flaked rice: 500g (additional fermentable without colour). Acidulated malt: 100g (water chemistry aid). Target colour: 2–4 SRM (nearly water-white). No crystal malt, crystal’s unfermentable dextrins are the enemy of bone-dry finish; the amyloglucosidase enzyme would not ferment them anyway. Total approximately 6.1 kg for OG 1.066. The amyloglucosidase (AMG) enzyme: Amyloglucosidase (glucoamylase) is an enzyme that converts dextrins, the large, normally unfermentable starch fragments left over after mashing, into simple sugars (primarily glucose) that yeast can ferment. Mashing at standard saccharification temperatures (65–68°C) leaves 20–30% of the wort as dextrins. Adding AMG enzyme produces a wort that is nearly 100% fermentable. Sources in homebrewing: White Labs Ultra-Ferm (WLN4000) is the homebrewing-specific AMG product. Beano tablets (the digestive enzyme tablet sold at pharmacies) contain amyloglucosidase and glucoamylase, crushing 3–4 Beano tablets and adding them to the fermenter at pitching is a very effective homebrew hack that produces Brut IPA character. Amano-4 enzyme (food-grade amyloglucosidase available from food enzyme suppliers). In India: Beano tablets are available at chemist shops and online pharmacies as “Gas-O-Fast” or digestive enzyme formulations, verify the enzyme content is amyloglucosidase/glucoamylase. Crushing and adding 4–5 tablets to the fermenter at pitching is effective. Process: Mash at 65–66°C. Cool wort to fermentation temperature (18°C). Add AMG enzyme at pitching (either commercial product or crushed enzyme tablets). Pitch US-05 at normal rate. Ferment at 18–20°C. The combination of yeast fermentation and AMG enzyme will drive FG to 1.000–1.004. Hops: Target IBU: 25–35 (lower than standard IPA due to amplified bitterness perception). Whirlpool and dry hop focused: Citra + Galaxy, 40g at whirlpool + 70–80g dry hop. No 60-minute bittering hops (or very minimal, 10g Columbus maximum). Indian homebrewing: Brut IPA’s extreme dryness is an interesting contrast to most Indian commercial beers. Beano (or equivalent) sourcing from Indian pharmacies makes the enzyme addition accessible without importing specialist homebrewing enzymes. The nearly water-white colour and champagne-dry finish tend to be surprising to Indian beer drinkers expecting a standard IPA’s slight sweetness.
Common Questions
Can I really use Beano tablets to make a Brut IPA?
Yes, Beano tablets (and equivalent digestive enzyme supplements) contain amyloglucosidase (glucoamylase) that is functionally identical to commercial brewing-grade AMG enzyme for the purpose of producing Brut IPA. The science behind it: Beano was originally developed as a digestive aid for reducing gas from bean and legume consumption. Legumes and many vegetables contain raffinose and other complex sugars that human digestive enzymes cannot break down, leading to fermentation by gut bacteria and gas production. Beano tablets provide amyloglucosidase to break down these complex sugars in the digestive tract. The same amyloglucosidase enzyme works in beer fermentation, it breaks down the dextrins (large starch fragments) in your wort into fermentable glucose that yeast can consume, driving the FG from a normal 1.010–1.014 down to 1.000–1.004. Practical instructions: Use regular strength Beano (or equivalent, gas relief enzyme tablets from any pharmacy brand). Crush 3–5 tablets into a fine powder. Add the powder to the fermenter along with the yeast at pitching. The enzyme is active in the 25–65°C range with optimal activity around 55–60°C, but it works effectively at fermentation temperatures (18–20°C), it just works more slowly. By the time fermentation is complete (7–10 days), the AMG has had enough time to convert most dextrins. Result: FG of 1.000–1.004 vs. the same beer without enzyme (FG 1.010–1.014). Caveats: Beano tablet fillers (binders, coating agents) do not affect beer flavour at the dosage used, multiple homebrewers have blind-tested Beano vs. commercial AMG enzyme and found no perceptible difference in the finished beer. Beano is a cost-effective and widely available substitute for commercial brewing AMG products. Cost comparison: commercial White Labs Ultra-Ferm is approximately ₹600–800 per dose. Beano tablets (pack of 30–60) approximately ₹200–400 from Indian pharmacies. The Beano approach produces equivalent results at lower cost, a legitimate and well-established homebrewing practice endorsed by professional brewers who developed the style.
