winter-made mochi
Refers to mochi (rice cake) made during the cold winter months, traditionally pounded and preserved in cold water. A seasonal food term.
Every year, my grandmother pounds winter mochi and sends it to relatives.
Compound of 寒 (kan, 'cold, winter') and 餅 (mochi, 'rice cake'). The exact historical origin is uncertain, but the term reflects the traditional practice of making mochi during the cold season for better preservation.