2. The time to cook abalone actually depends on how you cook it and the size of abalone. Then the bigger the abalone, the longer it takes to cook. Therefore, these large abalone should be sliced and cooked at low temperature, soaked for one night, and cooked the next day. The whole process takes at least two days. Slow cooking at low temperature is mainly to control the temperature, so abalone can be cooked slowly at home as long as there is a special thermometer for the kitchen.