If you're looking to thicken up your potato soup, there are a few different ways you can do so. One way is to add some flour to the soup. You'll want to add about 1 tablespoon of flour for every cup of soup. Another way to thicken the soup is to add some diced potatoes. You'll want to add about 1/2 cup of diced potatoes for every cup of soup. Finally, you can also add some cream to the soup. This will make the soup richer and thicker. You'll want to add about 1/2 cup of cream for every cup of soup. Whichever method you choose, make sure to stir the soup well so that the ingredients are evenly distributed.