It would be foolish of us to leave out the world’s most popular beer style from this book, but it does mean presenting a recipe that requires a bit more precision brewing than most. You can blame it on the yeast. Unlike the rest of our beers, which use top-fermenting yeasts, lager’s yeast is bottom fermenting – which requires lower temperatures, a few extra processes and a longer maturation time. But if you’ve got the patience and can give it the necessary cold environment,