This is a handy conversion recipe if you want to convert your favorite yeast recipe into a sourdough recipe so you can utilise your bubbly sourdough starter.
Weigh out 100g of active sourdough starter. This will be added INSTEAD of the yeast packet in your recipe (100g of starter is equivalent to 7g of yeast).
Reduce the amount of flour in the recipe by 50g and the water by 50g.
Add the sourdough starter to the ingredients, along with the reduced amount of flour and water and proceed with the instructions.
Increase the rise time for the recipe to accomodate your sourdough starter (you will need to more than double the rising time in most cases but it will depend on what you're making). See notes below for further information.