Crithomancy (also known as critomancy) is a form of divination by the study of barley cakes in hope of drawing omens from them. The paste of cakes which are offered in sacrifice is closely examined, and the sought-for answers are drawn from the flour which is spread upon them.
The term crithomancy (from Greek κριθή krithḗ) is also used for divination by cereal grains.
References
Crithomancy Wikipedia(Text) CC BY-SA