| Lambic | |
|---|---|
Bottled lambic beers | |
| Country of origin | Belgium |
| Yeast type | Spontaneous fermentation |
| Alcohol by volume | 2–8% |
| Color (SRM) | Yellow or pale to deep gold or dark red (when made with certain fruits, see below) |
| Malt percentage | 66% |
Lambic (English:/ˈlæmbɪk/LAM-bik,French:[lɑ̃bik]ⓘ;Dutch:lambiek[lɑmˈbik]ⓘ) is a type of beer brewed in thePajottenland region ofBelgium southwest ofBrussels since the 13th century.[1] Types of lambic beer includegueuze,kriek lambic, andframboise.[2] Lambic differs from most other beers in that it isfermented through exposure towild yeasts and bacteria native to theZenne valley, as opposed to exposure to carefully cultivated strains ofbrewer's yeast. This process gives the beer its distinctive flavour: dry,vinous, and cidery, often with a tart aftertaste.[3]
This beverage is first mentioned in 1794 asallambique. The initial 'a' was dropped early on so that in an 1811 advertisement it was calledlambicq, though it was sometimes referred to asalambic as late as 1829. The name may stem fromalembic, a type ofstill used for producing local spirits such ascognac andjenever (but not used in the production of lambic).[4] Breweries in and aroundLembeek, a village nearHalle, Belgium, have attempted to associate lambic with that name,[2] including through the legend of local saintVeronus of Lembeek.


Lambic is generally brewed from agrist containing about 60–70%barleymalt and 30–40% unmalted wheat. Thewort is cooled overnight in a shallow, flat, metal pan (generally copper orstainless steel) called acoolship, where it is left exposed to the open air so more than 120 different types of microorganisms mayinoculate the wort.[5] This cooling process requires night-time temperatures between −8 and 8 °C (18 and 46 °F).[6] While this cooling method of open-air exposure is a critical feature of the style, the key yeasts and bacteria that perform the fermentation reside within the breweries' timber fermenting vessels.[7] Over 80 microorganisms have been identified in lambic beer, the most significant beingSaccharomyces cerevisiae,Saccharomyces pastorianus, andBrettanomyces bruxellensis. The process is generally only possible between October and May as in the summer, too many unfavourable organisms that are in the air could spoil the beer.[8] In Brussels dialect, lambic produced after this traditional brewing season is referred to asbezomerd, meaning that it has had "too much summer".[6]Climate change is further shortening this limited brewing window; in the early 1900s, lambic brewers enjoyed roughly 165 days a year in the ideal temperature range, whereas by 2018, that number has shrunk to 140.[6]

Since at least the 11th century, and probably earlier,hops have been used in beer for their naturalpreservative qualities and for the pleasant bitterness, flavour, and aroma they impart. Since the method of inoculation and long fermentation time of lambic beers increases the risk ofspoilage, lambic brewers use large amounts of hops for their antibacterial properties. Lambic in the early 19th century was a highly hopped beer, using 8–9 g/L of the locally grown'Aalst' or 'Poperinge' varieties.[9] Modern lambic brewers, however, try to avoid making the beer extremely hop-forward and use aged, dry hops, which have lost much of their bitterness, aroma, and flavour.[10] Consequently, lambics often have a strong, cheese-like, "old hop" aroma, in contrast to the resiny, herbal, earthy hop bitterness found in other styles.[11][12] The favourite hop used for lambic in the nineteenth century was a variety calledCoigneau which was cultivated in the Aalst-Asse area in Belgium.[13]
After the fermentation process starts, the lambic is siphoned into barrels, mostly oldport wine orsherry barrels (ofchestnut oroak) fromPortugal or Spain. Some brewers prefer used wine barrels. The lambic is left to ferment and mature for one or several years. It forms avelo de flor of yeast that gives some protection from oxidation, in a similar way tovin jaune andsherry; the barrels are not topped up.
Lambic is usually a blend of at least two different beers; many producers are blenders who buy beer from other brewers and blend them together to create the desired result. Agueuze may have occupied space in several different cellars over six years or more. While those outside Belgium are likely to find bottled gueuze and fruited versions, a wider variety of styles is available to local drinkers. Beers are often blended again or sweetened with sugar or flavouredsyrups before drinking, as some can be extremely tart.[14] Most, if not all, of the varieties listed below, haveTraditional Speciality Guaranteed (TSG) status. This status does not specify that a product has a link to a specific geographical area.[15]
Unblended lambic is a cloudy, uncarbonated, bracingly sour beverage that is rarely available on tap. Draught releases are generally regarded as eitherjonge (young) oroude (old), depending on the age and discretion of the brewer. Bottled offerings fromCantillon and De Cam can be found outside Belgium.
A mixture of young (one-year-old) and old (two- and three-year-old) lambics have been bottled. Because the young lambics are not yet fully fermented, they undergo secondary fermentation in the bottle and produce carbon dioxide. A gueuze is given at least a year to carbonate in the bottle, but can be kept for 10–20 years.
Mars traditionally referred to a weaker beer made from the second runnings of a lambic brewing.[16] It is no longer commercially produced. In the 1990s,Boon Brewery made a modern Mars beer called Lembeek's 2% (the 2% referring to the alcohol content),[16] but it is now only produced for use ofTilquin as a component of their keg beers.

Historically,faro [nl] is a low-alcohol, sweetened beer made from a blend of lambic and a much lighter, freshly brewed beer to whichbrown sugar (or sometimescaramel ormolasses) was added. The fresh beer was referred to asmeertsbier, and was not necessarily a lambic.[17] Sometimes herbs were added as well. The use ofmeertsbier (or water) and of substandard lambic in the blend made this a cheap, light, sweet drink for everyday consumption. The 19th-century French poetCharles Baudelaire commented on faro's disagreeable aftertaste in saying, "It's beer that you drink twice", believing that the faro inBrussels was brewed from the waters of a river (theSenne orZenne) that was also used as asewer.[18]
The sugar was originally added shortly before serving, so does not add carbonation or alcohol to the beverage, as the sugar did not have the time to ferment. Modern faro beer is still characterized by the use of brown sugar and lambic, but is not always a light beer. The use of meertsbier has disappeared, and modern faro is not viewed as cheap or light. Today, faro is bottled, sweetened, and pasteurized to prevent refermentation in the bottle. Examples are produced byCantillon,Boon,Oud Beersel,Lindemans orMort Subite.
Lambic refermented in the presence ofsour cherries (usually themorello variety, or a bitter variety known as the Schaarbeek cherry) and with secondary fermentation in the bottle results inkriek.[2][14] Traditional versions of kriek are dry and sour, just as with traditionalgueuze.


Lambic may be made with the addition ofraspberry (framboise),peach (pêche),blackcurrant (cassis), grape (druif), orstrawberry (aardbei), as either whole fruit or syrup. Other, rarer fruit lambic flavorings include apple (pomme), banana (banane),pineapple (ananas),apricot (abricot),plum (prune),cloudberry (plaquebière), lemon (citron), andblueberry (myrtille). Fruit lambics are usually bottled with secondary fermentation. Although fruit lambics are among the most famous Belgian fruit beers, the use of names such as kriek, framboise or frambozen, cassis, etc. does not necessarily imply that the beer is made from lambic. The fruit beers produced by theLiefmans Brewery, for example, use anoud bruin, rather than a lambic, as a base.
Many of the non-traditional fruit beers derived from lambic that was commercialized in the last decades are considered to be low-quality products by many beer enthusiasts.[2] These products are typically artificially sweetened, artificially carbonated, sterilized, and based on the juice of the fruit instead of the whole fruit.

Lambic beers are only produced near Brussels due to that region's naturalmicroflora.[19] The number of producers, which numbered more than 300 in 1900, shrank drastically throughout the 20th century.[14] Lambic production is generally sanctioned and promoted byHORAL.[14]