Dried porcini mushrooms Dried porcini mushrooms are obtained through a dehydration process without the addition of preservatives; Rehydration can occur in different ways: for about half an hour in lukewarm water with a bit of lemon added; in cold water for about two hours; in boiling water for a few minutes. In all cases, the cooking water can be used as a seasoning after being filtered if necessary to enhance the aroma and taste of the porcini mushrooms. Size: 30 g