OAKLAND, Calif. (AP) — U.S. food banks already dealing with increased demand from families sidelined by the pandemic now face a new challenge — surging food prices and supply chain issues walloping the nation.

The higher costs and limited availability mean some families may get smaller servings or substitutions for staples such as peanut butter, which some food banks are buying for nearly double what it cost two years ago. As holidays approach, some food banks worry they won't have enough stuffing and cranberry sauce for Thanksgiving and Christmas.

"What happens when food prices go up is food...