Myth: A Potato Can Save a Salty Soup or Stew
False. "This is an attractive idea, but it doesn’t work because potatoes are not particularly absorbent,” says Wolke, who conducted his own soup-and-potato experiment for his book. “There is no reason they would attract salt.” If you remove the raw potato from the soup, the potato will taste salty, but so would a sponge―it has simply soaked up some of the salty liquid. Still, there is hope for salty stews: Adding a bit of vinegar or sugar can “cancel out” the saltiness by giving your taste buds competing flavors.