Put the cold syrup into a stainless steel saucepan, add the rhubarb and sweet cicely. Cover, bring to the boil and simmer for just 1 minute, (no longer or it will dissolve into a mush).

but also some lesser seen ingredients like rhubarb bitters, prickly pear syrup, and grated nutmeg. They also make use of different styles of tequila, from reposado to cristalino to añejo ...