The approximate time it takes to brew a Budweiser beer is 30 days. The beechwood aging process is actually a traditional European brewing process Budweiser uses to ensure the quality and consistency of all their beers. While on the tour, you"ll find this "beechwood aging" process takes place in stainless steel vessels, not actual beechwood barrels. The beechwood chips are actually layered in the bottom of the tank before the tank is filled with beer.