Orjeat syrup (also spelled Orgeat, but all the same to us)

Orgeat syrup is a sweet syrup made from almonds, sugar and rose water/orange-flower water. It was, however, originally made with a barley-almond blend. It has a pronounced almond taste and is used to flavor many cocktails. Nothing that can be procured easily at your local booze shop. Lots of traditional Yunani sherbets may actually taste like this and could make good substitutes.