The Golden Blend is made with 4 year old Lambic that accounts for 25 % of it’s contents, the rest of the blend is made up by a "secret" combination of 1, 2 and 3 year old Lambic.
The exact mixture is only known by the master-blender Armand himself.
The name "Golden Blend" is not far away from the truth, in fact, the 4 years of maturation in oak-wooden barrels is making this particular Lambic very expensive.
Due to the "evaporation" through the barrels, only a small percentage of the lambic is left over after 4 years of maturing.
The 2015 version (bottle date 12/03/2014) has 7.5% ABV (although some labels say 6%)