Peat Reek is the smell of burning peat, the flavours of which are imparted to malting barley as it is slowly dried while the smoky reek of the peat is drawn over it. For Blackadder Peat Reek, they select only casks of whisky produced using malted barley that has been heavily impregnated with the phenols and creosols of a gently-smouldering peat fire.