Potato sourdough starter produces a milder sourdough bread than the stronger rye or wheat starters. This starter is also inexpensive to make, using only three medium potatoes. The bread flour can be replaced with all-purpose, wheat, or rye flour, making it a flexible recipe that can be pulled together easily. What’s best about this ​potato sourdough starter is that you restart it every two weeks, preventing the yeast from becoming too sour; you can also restart the starter from scratch or by using a cup of the original starter.

When making sourdough bread, remember that 1 cup of potato sourdough starter can be used in place of 1 package active dry yeast.