<P> Following Jim Koch 's great - great grandfather 's recipe , Samuel Adams continued to use traditional brewing processes , including decoction mash ( a four vessel process ) and krausening ( a secondary fermentation ) . Boston Lager is also dry hopped using the Hallertau Mittelfrueh and Tettnang Tettnanger hops . </P>
what kind of beer is sam adams boston lager
dry hopped using the Hallertau Mittelfrueh and Tettnang Tettnanger hops