50 Most Powerful Women

2007 rank: 5
Age: 55

When she took the helm of the food and beverage giant, Rosenfeld implemented a three-year plan she calls "the big cheese of all turnarounds." She's plowing money into brand building, empowering local managers in developing countries, and launching more ready-to-eat fare such as heat-and-serve Deli Creations flatbread sandwiches. This year the stock, which has remained relatively flat, replaced AIG on the Dow, and Warren Buffett recently upped his stake to 9%.

NEXT: Pat Woertz