Here is a recipe to make sourdough using kombucha and a simple video tutorial.
2 T flour
2T kombucha liquid that houses the scobies
1/4 C Flour & water
1/2 C Flour & water
1 C Flour & water
Day 5 or before if the starter doubles in 4 hours it is ready to bake bread with
You can get Kombucha Scobies at amazon.com or other websites if you just use your internet search engine.