Cordyceps is a genus of parasitic fungi that grows on the larvae of insects.
Cordyceps Militaris is currently grown on brown rice in commercial environments.
In Asia the fruiting body is cooked as a mushroom in dishes like chicken soup, pork bone soup  and hot pot. The fruit can be added to salads.
The fruiting bodies kind of look like Cheetos.
 
Possible helath benefits:
1 - May Boost Exercise PerformanceCordyceps are thought to increase the body’s
      production of the molecule adenosine triphosphate (ATP), which is essential for
      delivering energy to the muscles.
2 - Anti-Aging Properties. Helps to reduce fatigue and boost strength and sex drive.
      Researchers believe their antioxidant content ma explain their anti-aging potential
3 - Potential Anti-Tumor EffectsCordyceps’ potential to slow the growth of tumors has
      generated significant interest in recent years.
4 - May Help Manage Type 2 DiabetesCordyceps contain a special type of sugar that may
      help treat diabetes.
5 - Possible Benefits for Heart HealthAs research emerges on the effects of Cordyceps on
      heart health, the benefits of the fungi are becoming increasingly apparent.In fact,
      Cordyceps are approved in China for the treatment of arrhythmia, a condition in which
      the heartbeat is too slow, too fast or irregular.