For this speciality, we use old and young lambic beer that has aged in our oak casks. When the lambic is 6 months old, we add 25% black cherries. This provokes the second fermentation. We then clarify, filter and bottle it. Kriek Boon has an alcohol volume of 4% and is available in kegs of 20 litres, 25 cl bottles with crown cap and bottles of 37.5 cl and 75 cl with cork.