Advanced Cicerone cheat sheet

Draught dispense pressure must balance carbonation: applied pressure (psi) ≈ 1 psi per 2 °F of beer temperature plus ~1 psi per 1 vol CO2 above 1.0; blend gas (typically 60-70% N2) is used for nitro pours and long-draw systems to prevent over-carbonation.

Standard keg couplers: Sankey D (US), Sankey S (Europe), A/G (German slider), U (Guinness/nitro). Couplers are not interchangeable; wrong coupler type damages the probe and causes foam.

Beer line restriction: 3/16 in ID vinyl ≈ 2-3 psi/ft, 5/16 in ≈ 0.1-0.5 psi/ft. Total restriction (line + elevation + faucet) should roughly equal keg pressure for balanced flow.

Cellar temperature for cask ale: 50-55 °F (10-13 °C). Cask beer is served via gravity or handpump at 1-2 psi; venting (soft spile) releases excess CO2 before hard-spiling.

Draft system cleaning: line cleaning every 2 weeks with alkaline line cleaner, followed by potable water rinse; quarterly deep clean of couplers and FOB.

Glassware: nucleated/tulip/IPA glasses release aroma; improper rinse (detergent residue) kills head retention. Beer-clean glass = no lacing break, no bubbles clinging to sides before pour.

Bottle storage: keep upright, dark, 45-55 °F for cellaring; lightstruck (skunky) reaction from UV on iso-alpha acids occurs within minutes in sunlight.

Draft pour temperature: 38-42 °F for most ales/lagers; 45-50 °F for cask and strong ales. Over-chilling suppresses aroma and perceived malt complexity.

BJCP 2021 style families (26 categories): Standard American (1), International Lager (2), Czech Lager (3), Pale Malty European (4), Pale Bitter European (5), Amber Malty European (6), Amber Bitter European (7), Dark European (8), Strong European (9), German Wheat (10), British Bitter (11), Pale Commonwealth (12), Brown British (13), Scottish (14), Irish (15), Dark British (16), Strong British (17), Pale American (18), Amber/Dark American (19), American Porter/Stout (20), IPA (21), Strong American (22), European Sour (23), Belgian Ale (24), Strong Belgian (25), Trappist (26).

Key numeric anchors: German Pils 4.4-5.2% ABV, 22-40 IBU; American IPA 5.5-7.5% ABV, 40-70 IBU; West Coast IPA often 6.5-7.5%, 50-70 IBU; Hazy IPA 6.0-7.5%, 30-50 IBU (soft bitterness, high late-hop).

Stout family: Irish Dry Stout 4.0-4.5% ABV, 25-40 IBU (roasted barley, low hop); Sweet Stout 4.0-6.0%, 20-30 IBU (lactose); Oatmeal Stout 4.2-5.9%; Imperial Stout 8.0-12.0%, 50-90 IBU.

Belgian strong ales: Dubbel 6.0-7.5%, 15-25 IBU; Tripel 7.5-9.5%, 20-40 IBU; Quadrupel 9.1-14% ABV. Trappist is a legal designation (Authentic Trappist Product logo, 14 monasteries as of 2024).

Sour styles: Berliner Weisse 2.8-3.8% ABV, 3-8 IBU; Gose 4.2-4.8%, 8-12 IBU (salt + coriander); Lambic/Fruit Lambic 5.0-7.0%; Flanders Red 5.0-7.0%, 10-25 IBU.

Wheat styles: Weissbier/Hefeweizen 4.3-5.6% ABV, 8-15 IBU (banana/clove yeast); Witbier 4.5-5.5%, 8-20 IBU (orange peel, coriander, unmalted wheat); American Wheat 4.0-5.5%.

Pale ale family: English Bitter 3.2-4.6%, 25-40 IBU; American Pale Ale 4.5-6.2%, 30-50 IBU; British IPA 5.0-7.5%; Double IPA 7.5-10.0%, 60-120 IBU.

Lager styles by color/strength: Helles 4.7-5.4% (pale, malty); Dunkel 4.5-5.6% (Munich malt); Schwarzbier 4.4-5.4% (dark, dry); Czech Premium Pale Lager 4.2-5.8%, 30-45 IBU (Saaz, soft water).

BJCP scoring: 50 points total = Aroma 12 + Appearance 3 + Flavor 20 + Mouthfeel 5 + Overall Impression 10. Scores 45-50 Outstanding, 38-44 Excellent, 30-37 Very Good, 21-29 Good, 14-20 Fair, 0-13 Problematic.

Off-flavor thresholds (typical): Diacetyl (2,3-butanedione) 0.1-0.2 mg/L (buttery); Acetaldehyde 10-20 mg/L (green apple); DMS 30-50 µg/L (cooked corn); Trans-2-nonenal 0.1-0.2 µg/L (papery/cardboard); Isoamyl acetate 1-2 mg/L (banana); Ethyl hexanoate 0.2-0.3 mg/L (apple/anise).

Lightstruck (3-methyl-2-butene-1-thiol, MBT) forms when UV/blue light cleaves iso-alpha acids; detectable at ng/L levels - one of the most potent beer off-flavors.

Astringency comes from grain husk tannins (high sparge temp, over-milling, high pH sparge >6.0) or oxidized hops; perceived as drying, puckering, not bitter.

Mouthfeel descriptors: body (light/medium/full), carbonation (low/medium/high), warmth (ethanol), creaminess (nitrogen, oats, lactose), astringency, and finish (dry/sweet).

Serving temperature affects perception: cold (38-42 °F) suppresses aroma and malt sweetness; warming to 50-55 °F reveals esters, diacetyl, and oxidation.

Evaluation order: assess appearance (color, clarity, head), then aroma (malt, hops, yeast, off-flavors), then flavor (attack, mid-palate, finish), then mouthfeel, then overall.

Common faults by cause: phenolic/medicinal (wild yeast/chlorine); solventy (high fermentation temp); sulfidic (yeast stress, lagering); sour (Lactobacillus/Pediococcus contamination).

Four ingredients: water (90%+ of beer), malted barley (base + specialty), hops (bittering, flavor, aroma), yeast (ale: S. cerevisiae, 60-72 °F top-fermenting; lager: S. pastorianus, 45-55 °F bottom-fermenting).

Mash conversion: saccharification rest 148-158 °F; lower (148-152 °F) = more fermentable, drier; higher (155-158 °F) = more dextrins, fuller body. Beta-amylase optimum ~140-150 °F, alpha-amylase ~158-162 °F.

Mash pH target 5.2-5.6; sparge water pH <6.0 to prevent tannin extraction. Water chemistry: sulfate accentuates hop bitterness (Burton ~600+ ppm), chloride accentuates malt (Munich ~10 ppm).

Hop utilization: bitterness (IBU) increases with boil time; ~60 min for bittering, 15-20 min flavor, 0-5 min/whirlpool aroma. Dry hopping adds aroma without IBU (no isomerization below ~180 °F).

Fermentation: primary 3-7 days; diacetyl rest at 60-65 °F for lagers near end of primary; lagering 4-8 weeks at 32-40 °F. Attenuation = (OG - FG)/OG × 100; typical 70-80%.

ABV = (OG - FG) × 131.25 (or × 1.05/0.79 for accurate calc). Apparent attenuation vs real attenuation (real ≈ apparent × 0.81).

Specialty malts: Crystal/Caramel (stewed, adds color/sweetness/body), Munich/Vienna (kilned, malty), Roasted barley (unmalted, dry roast), Black patent (highly roasted, acrid), Chocolate (roasted, chocolate/coffee).

Yeast pitching: ~1 million cells/mL/°P for ales; lagers need ~1.5-2× and a starter. Under-pitching → esters, diacetyl, sluggish fermentation.

Boil: 60-90 min, evaporation ~10%/hr; hot break (protein coagulation), cold break (chilling). Whirlpool removes trub before fermentation.

Core pairing principles: match intensity (delicate beer with delicate food), complement (similar flavors), contrast (opposites - sweet vs. sour, rich vs. bitter), and cut (carbonation/bitterness cleanse fat).

Bitterness (IBU) amplifies sweetness and masks salt; high-IBU beers clash with sweet desserts and delicate fish. Sweetness in beer balances spicy heat (capsaicin).

Carbonation scrubs fat and refreshes palate - high-carbonation wheat/saison with fried foods; low-carbonation cask/stout with rich stews.

Acidity/sourness (Berliner Weisse, Gose, Lambic) cuts through fat and complements creamy/cheesy dishes; also pairs with seafood and vinaigrette.

Roasted malt (stout/porter) pairs with chocolate, coffee, oysters, grilled meats; Maillard reactions in both beer and food amplify each other.

Ester-forward Belgian ales (banana, clove, fruit) pair with aromatic dishes (Thai, Indian, charcuterie); avoid with delicate sushi.

Hop-forward IPAs pair with fatty/grilled meats, aged cheddar, spicy cuisine (hops + capsaicin can clash if extreme); citrusy hops complement citrus/fish.

Classic pairings: Weissbier + Weisswurst; Saison + charcuterie; Stout + oysters/chocolate; Pilsner + fried fish; Belgian Tripel + rich cheeses; Barleywine + blue cheese/stilton.