Flavoured coffees are made by adding natural or synthetic flavouring oils to roasted coffee beans. When it comes to natural flavouring, processes tend to involve the extraction of oils from ingredients such as cocoa beans, berries, spices or nuts, which are then used to coat regular beans.
Some of the more unusual flavours, that can’t easily be extracted from natural ingredients, can be created by using a synthetic flavouring process that adds chemical additives to roasted beans. This process often gives whole beans and flavoured ground coffee a slightly shiny gloss.