Wash 100 grams of date pits well with water to get rid of the impurities attached to it, then soak them in lukewarm water for about six hours, or until they soften and become a little soft. Drain the kernels from the water well, then roast over a low heat until they turn light brown in color. Put the roasted kernels in an electric grinder, then grind well to get a very fine powdery mixture. Date seed powder is stored in an airtight container until use.