Color: Any color is acceptable. Beer color may be influenced by the color of added fruits or other ingredients.
Clarity: Chill haze, bacteria and yeast-induced haze is allowable at low to medium levels at any temperature.
Perceived Malt Aroma & Flavor: In darker versions, roasted malt, caramel and chocolate aromas and flavors are present at low levels.
Perceived Hop Aroma & Flavor: Low to high
Perceived Bitterness: Low to high
Fermentation Characteristics: Moderate to intense fruity-estery aromas and flavors are evident. Acidity resulting from fermentation with Brettanomycesand/or bacteria results in a complex flavor profile.
Brettanomycescharacter should be present and expressed as horsey, goaty, leathery, phenolic, fruity and/or acidic aromas and flavors. Cultured yeast may be used in the fermentation. Bacteria should be incorporated and in evidence. Bacteria will contribute acidity which may or may not dominate the flavor profile. Diacetyl and DMS should not be perceived.
Body: Low to high
Additional Notes:
Fruited versions will exhibit fruit flavors in balance with other elements. Wood vessels may be used for fermentation and aging, but wood-derived aromas and flavors such as vanillin should not be present. Versions exhibiting attributes derived from wood or liquids previously aged in wood would be classified in other Wood-Aged Beer categories. Wood-and barrel-aged sour ales would be classified in other style categories.
When using these guidelines as the basis for evaluating entries at competitions, brewers may be asked to provide supplemental information about entries in this category to allow for accurate evaluation of diverse entries. Such information might include the underlying beer style upon which the entry is based, or other information unique to the entry such as type of Brett(s) and/or other culture(s) used, fruit(s) or other ingredients used or other factors which influence perceived sensory outcomes.