Grandmothers Revenge is finger licking nummy medium cocktail at 1.3 standard drinks. Built with 30ml whisky the new zealand 25year and 150ml beer brew altbier with 10ml lemon syrup as well as 100ml ice and good with afternoon tea. Just fill iceto glass then pour in lemon syrup and add shot of whisky. Top with beer and served in a highball glass cold.