Scottish or English pale base malt. Small amounts of roasted barley add color and flavor, and lend a dry, slightly roasty finish. English hops. Clean, relatively un-attenuative ale yeast. Some commercial brewers add small amounts of crystal, amber, or wheat malts, and adjuncts such as sugar. The optional peaty, earthy and/or smoky character comes from the traditional yeast and from the local malt and water rather than using smoked malts.