Oud Beersel Kriekenlambiek is a traditional Lambic beer, produced by the addition of real sour cherries for natural fermentation in young Lambic. Once the cherries have been fully macerated and fermented, the Kriekenlambiek is blended with an older lambic to reach the desired flavor. For each liter of Kriekenlambiek, there are 400g of sour cherries. It is not sweetened; no flavorings or preservatives have been added.