Protected method
Oude Geuze, Lambic, Sahti: traditional specialties guaranteed
Traditional Specialties Guaranteed, or TSG, protects not an area of origin but a method. In beer, these are Oude Geuze and Oude Kriek from Belgium. Lambic, Gueuze and Kriek without "Oude" have no longer been EU-protected since January 4, 2023.
What is a TSG, and how does it differ from a PGI?
With a PGI, the name is tied to a place. With a TSG, it's tied to a method of production. Anyone who follows the registered recipe and process may use the name, regardless of where in the EU they brew. An Oude Geuze from Bavaria would theoretically be possible, if made exactly according to the specification. In practice, these beers still come from Belgium, because that's where the expertise, the barrels and the yeasts are found.
One detail from EU law matters here. A TSG could be registered with or without reservation of the name. With reservation, only producers following the specification may use the name. Without reservation, the registration functioned more like a distinction, without preventing other brewers from using the name. This weaker form was allowed to expire under Regulation 1151/2012.
For beer drinkers, a TSG is above all a signal about production method. It promises that a beer was made in a particular, time-honored way. Whether it tastes good, as always, is for the glass to decide.
Is Lambic EU-protected?
No, not anymore. Lambic, Gueuze-Lambic, Gueuze, Kriek and Faro were registered in 1997 as TSG without reservation of the name. Under Article 25(2) of Regulation 1151/2012, such registrations expired as of January 4, 2023. Whether Faro was listed separately or as part of the Lambic group isn't entirely clear. A beer today may therefore be called Lambic or Kriek without following any EU rule.
The old forms remain protected, however. Under Regulation (EU) 2017/2216 of December 1, 2017, Oude Geuze, Oude Geuze-Lambiek and Oude Lambiek — in French, Vieille Gueuze and Vieux Lambic — are TSGs with reservation of the name. The same applies to Oude Kriek, Oude Kriekenlambiek, Oude Frambozenlambiek and Oude Fruit-lambiek. Their roots trace back to a certification of specific characteristics from 1997.
Oude Geuze and Oude Kriek: what "Oude" tells you
Lambic is a spontaneously fermented beer: instead of a cultivated yeast, wild yeasts and bacteria from the air and the wooden barrels inoculate the wort. It ages for a long time and tastes sour, dry, often reminiscent of barnyard and citrus. Gueuze is a blend of young and old Lambic that undergoes secondary fermentation in the bottle, developing carbonation. Kriek is created when sour cherries ferment along with the Lambic. For more on how spontaneous fermentation actually works, see the yeast journey.
The word "Oude," meaning old, marks the traditional style. It stands for mature Lambic and bottle conditioning, as opposed to sweet, pasteurized industrial versions sold under the unrestricted names. It's often said that Lambic may only be made in the Senne Valley and the Pajottenland west of Brussels. That's tradition and a convention of the HORAL brewers' association, not an EU origin rule. Well-known houses like Cantillon aren't even HORAL members.
That makes it worth reading the label closely when buying. If it says Oude Geuze or Oude Kriek, the beer follows the protected specification. If it just says Geuze or Kriek, it could be almost anything, from a carefully blended beer to a sweet fruit beer. Faro, a Lambic sweetened with sugar, currently has no EU protection.
Sahti: Finland's farmhouse beer with juniper
The second beer with a TSG history comes from Finland. Sahti is an old farmhouse beer made from barley, often with rye, flavored with juniper. Traditionally, the wort filters through a bed of juniper branches and is often not boiled at all, unlike almost every other beer. The result is cloudy, robust and only briefly shelf-stable, more a fresh farmhouse beer than something made for lagering.
Sahti has been registered as a TSG since 2002. Whether it carries reservation of the name, and whether that protection survived the 2023 cutoff, isn't entirely clear. The UK register still lists Sahti. For readers, the takeaway is this: Sahti is a protected method, not a protected place, and anyone wanting the precise current status under EU law should check the latest register.