Durian paste is made from surplus overripe or dropped fruit. Overripe durian is preferable for paste because it is easier to dehusk and stir during mixing. Pour and stir over-ripe durian in the open pan. Add 12 % to 20 % sugar by weight, and heat over a wood, charcoal or gas stove for approximately three hours. The heat should be moderate to avoid burning and the paste continuously stirred with a paddle to mix the aril and remove moisture. To check whether the paste is ready, a small amount should be picked up by hand during stirring. If it is not sticky, then stirring may stop and the paste left to cool. If it is still sticky, stirring must continue. The finished product can be wrapped in plastic film and packaged in a foam tray depending on its weight. Durian paste can be kept at room temperature for four months or frozen at -20 ºC for one year without a reduction in edibility. The processing of durian paste is as follows: