Minatsuki/minazuki (水無月) are made from 'uirō-mochi' (外郎餠), a steamed cake of rice or bracken flour and sugar.
The sweets are traditionally topped with a layer of red beans, cut into triangles, and wrapped in bamboo leaves.
Appearing in the Muromachi period, minatsuki were created to mimic the ice eaten around this time by the imperial court as part of a festival to cool down during the onslaught of summer.
Ice was prohibitively expensive, so the sweets were cut into triangles to look like ice🧊