Orgeat, pronounced (Or-Zsha), is common syrup used in tiki cocktails. It's made of almonds that are cooked into a syrup and finished with a touch of spirit as a preservative. Orgeat also makes a great flavoring for coffee drinks. It can be made non-alcoholic, however the shelf life will be slightly reduced.
We cook our orgeat Sous Vide in order to retain more of the almond aroma and prevent the syrup from reducing during infusion.