candied bean slab
A traditional Japanese sweet made from mashed beans and sugar, pressed into a flat slab and often cut into pieces. Sometimes translated as 'bean jelly' or 'bean candy'.
My grandmother sent me some homemade candied bean slabs.
Candied bean slabs become elegantly sweet when made with wasanbon sugar.
mameitagin; Edo-period silver currency lump
From 豆 (bean) and 板 (board, slab), referring to the slab-like shape of the confection.