Yes, you can make your own sourdough starter from scratch! It’s very easy, and you will love making traditional sourdough bread with it. If you have flour and water on hand, you can make your own starter. I used whole wheat flour for mine.
The first week you will be building up the starter. Use a 1 to 1 ratio of water and flour. I used 1/2 a cup of both to start out. Put the flour and water in a glass jar ( i used a mason jar), and stir with a wooden spoon. If you are on city water use filtered water because the chemicals in city water like chlorine will kill the starter. After you are done stirring cover the jar with a coffee filter, cloth, or paper towel. This will keep bugs out and the starter can collect yeasts in the air. If you are like me and have kombucha brewing too, use half plain kombucha with the water to kick start your starter.
Stir and feed your starter every day for 5-7 days twice a day. The liquid on top can be drained off and used in your pancakes (or cookies too). You will see bubbles form after a few days, and smell the sweet sour smell of sourdough!
You can store your starter in the fridge just make sure to feed it every week. And if you want to use refrigerated starter set it out 4-6 hours before you use it so it will be room temperature.