<human>:  What is the best way to make a sourdough starter?
<bot>: The best way to make a sourdough starter is to combine equal parts of flour and water in a large bowl and mix until a thick batter forms. Allow the mixture to sit in a warm place and stir daily for 5-7 days. After 5-7 days the starter will be ready to use and can be stored in the fridge or freezer.