Growing wild yeast requires to discard some portion of the yeast everyday to maintain the level and active of the yeast. The discard yeast can be used in other stuff, like pancake. Instead of baking soda or baking powder, the wild yeast was added as a leavening agent. I made the batter the night before and made the pancake in the morning. It rose as regular pancake, but the texture is more chewy with a bit of sourness from the yeast.