Cicerone Beer Server cheat sheet

Ale = top-fermenting Saccharomyces cerevisiae at 60–75°F (15–24°C); lager = bottom-fermenting S. pastorianus at 45–55°F (7–13°C) plus a period of cold conditioning.

Four core ingredients: water (roughly 90% of the finished beer), malted barley, hops, and yeast; anything else is an adjunct or a flavor addition.

Malt flavor words: bready, biscuit, cracker, caramel, toffee, toast, chocolate, coffee, roast.

Hop flavor words: citrus, grapefruit, pine, resin, floral, herbal, grassy, spicy, tropical, stone fruit.

Yeast flavor words: fruity esters (banana, apple, pear, pineapple) and spicy or medicinal phenols (clove, pepper, smoke).

Measurement scales: IBU = bitterness, SRM or EBC = color, %ABV = alcohol, °Plato or specific gravity = fermentable sugar.

Pilsner: pale straw to gold, 4–5% ABV, about 30–40 IBU, clean malt with spicy noble hop character. Stout: dark brown to black, 4–7% ABV, roast, coffee, and chocolate from roasted barley.

American IPA: 5.5–7.5% ABV and 40–70 IBU, hop aroma forward with citrus, pine, or resin over a supporting pale malt base.

Wheat ales: hazy, low bitterness, low hop aroma, yeast-driven - banana and clove in Hefeweizen, tart lactic acidity in Berliner Weisse and Gose.

A beer-clean glass has no grease, lipstick, detergent film, or dust; any residue collapses the head and leaves bubbles clinging to the glass wall.

Glass shape follows style: pint for session lagers, tulip or snifter for aromatic and strong ales, tall vase for wheat beers.

Draft pour: hold the glass at 45 degrees, open the tap fully in one motion, run beer down the side, then straighten the glass to build a 1–1.5 inch head (about 5% of the volume).

Serving temperatures: pale lagers 38–45°F (3–7°C); ales 45–50°F (7–10°C); strong ales, stouts, and cask ale 50–55°F (10–13°C).

Draft balance: about 12–14 psi at 38°F holds roughly 2.5 volumes of CO2; excess pressure produces foam, insufficient pressure produces flat beer and lost aroma.

Draft lines are cleaned and rinsed at least every two weeks; line length and diameter (commonly 5–6 ft of 3/16 in. inside diameter) are matched to the applied pressure.

Keg yields: 1/2 barrel = 15.5 gal = 1984 oz, about 124 pours at 16 oz; 1/4 barrel (pony) = 7.75 gal, about 62 pours.

Bottle service: pour down the tilted glass wall in one steady motion and leave the last ounce with the yeast sediment if the beer is bottle-conditioned.

Cask ale is served at 50–55°F with only 1.0–1.5 volumes of CO2 by gravity or hand pump; it is not pushed by external gas pressure.

Lightstruck, skunky flavor comes from UV light breaking hop iso-alpha acids into 3-methyl-2-butene-1-thiol (3-MBT); brown glass blocks most UV, while green and clear glass block very little.

Oxygen pickup produces wet cardboard, papery, or sherry notes (trans-2-nonenal); control headspace, purge lines, and keep kegs sealed and under gas.

Heat accelerates staling; store at 45–55°F (7–13°C) or cooler, avoid temperature cycling, and never store packaged beer above roughly 70°F.

Stock rotation rule: first in, first out - the oldest packaged beer is sold and served first.

A tapped keg holds best quality for roughly 30–60 days when kept cold under correct gas pressure; match pour volume to that window.

Keep the whole path cold: warm lines and warm kegs let CO2 break out as foam and speed up flavor loss.

Bottle-conditioned beer is stored and served upright and handled gently so the yeast sediment stays settled in the bottle.

A FOB (foam-on-beer) valve at the coupler stops foam and beer from being pushed into the gas line when a keg empties.

Beer with detectable off-flavors - skunky, cardboard, buttery diacetyl, or sour - is rotated out or rejected rather than served.