Aunt Jemima is making her last batch of pancakes. Quaker Oats said Tuesday that its Aunt Jemima brand pancake mix and syrup will be renamed Pearl Milling Company. Quaker Oats, a division of PepsiCo Inc., had announced last June that it would retire the Aunt Jemima brand, saying the character’s origins are “based on a racial stereotype.” The smiling Aunt …