Coffee which has been brewed then dried through one of two methods. The first and most expensive method involves freeze-drying and spray drying the brewed coffee. This method produces the best tasting coffee. The alternate and less expensive method uses a spray-drying process only. For more information follow the read more link.
To use instant coffee simply add the crystals to hot water and stir. Instant coffee varies immensely in cost and quality and many good brands are available in you local market. Instant coffee should be stored in a tightly sealed container as exposure to air turns the crystal into a hard "brick".
Instant coffee can be used to flavor whipped cream or other desserts. If you want a stronger mocha flavor use instant espresso.