The distinctive blue and white packaging for Jiffy corn muffin mix may seem charmingly dated, a throwback to pantries of decades past. Splashy rebrands are not the company's style, said Howard S.

Chelsea — Grocery prices are up about 3% year-over-year as Americans prepare their Thanksgiving meals, but shoppers this month still could find Jiffy's six-corn muffin mix in its unmistakable blue-and ...