Gather ingredients and a jar that is large enough for your starter to expand and grow.
Place 1 tablespoon of sourdough starter into your jar.
Add ¼ cup of water to the jar
Add ½ cup einkorn flour to jar and mix all the ingredients until all the flour is combined.
Seal the jar with a lid and let it ferment for 4 - 8 hours.
Remove and discard all but ¼ cup of your starter. Add ½ cup flour to your jar and 1/4 cup water. Stir well to combine all the flour and let sit for another 4- 8 hours. Continue doing this step two more times or until your starter is bubbly and you see tiny pin size holes in your starter and bigger holes on top. Then it is ready to bake with or to store in the refrigerator. (This picture is a starter fed with Einkorn Whole Wheat Flour)