PURPOSE: To obtain the titled jam useful for cakes, buns, etc., having high quality, an improved hue, and taste, by stirring grain of maize by a mixer, making them into a state wherein a skin component is easily separable from a seed component without cutting the skin into pieces, making the seed component screened with water.

CONSTITUTION: Seeds of maize are boiled in a pressure cooker, with the seeds of maize absorbing water and softened stirred by a mixer with round blade tips. The seeds are made into a state wherein a seed component is easily separable from a seed component without cutting the skin into pieces, and the seeds are put on a filter net, filtered while adding water to it, the skin component is separated on the filter net, the seed component and water are received in a container. The jam juice is precipitated, the upper water is removed, the jam juice with high concentration of jam component is boiled, to give the aimed jam.

EFFECT: A simple device can be used.