If you're boiling it, it usually takes about 10 minutes on high heat, and the color of the cooked water chestnuts will deepen. If it is to be eaten steamed or as a dessert, it usually takes about half an hour so that the water chestnuts will be softer and easier to crush. If it is to be fried to eat, add water chestnuts and stir-fry for a few minutes can be out of the pot to eat, but water chestnuts belong to the cold food, for the cold or cold spleen and stomach of the crowd, should reduce the consumption, to avoid causing adverse reactions.