PURPOSE: A vessel is filled with a plurality of solid jelly pieces with a high sol-transformation temperature and a liquid jelly that is obtained by heating a low sol-transformation temperature jelly and tightly sealed, then heated under pressure to effect sterilization, thus producing jelly with unique taste.

CONSTITUTION: A water-and heat-resistant vessel of plastic or aluminum is filled with a plurality of solid jelly pieces with a high sol-transformation temperature (containing a large amount of sugar, fruit, organic acid, alcohol, sweet bean jam, nuts, vegetables, cocoa and so on) and a liquid jelly that is prepared by heating a jelly with a low sol-transformation temperature (containing a small amount of sugar, yoghurt, raw cream, coffee, cream mousse) and sealed tightly. Then, they are heated in a retort type pressure can above 50°C at such a temperature as the solid jelly pieces are converted into sol but not mixed with the jelly of low sol-transformation temperature to a low extent to effect sterilization. After sterilization, it is cooled for storage.