PARSIPPANY, N.J. — Post Foods, L.L.C., a subsidiary of Ralcorp Holdings, has introduced a new Pebbles limited-edition flavor: Boulders Stone Age Caramel Apple. Each serving of caramel boulders and apple dinosaur bones contains 16 grams of whole grains and is considered an excellent source of vitamin D.

“We’re excited to add a new cereal line to the Pebbles family, with the goodness of whole grains and great new taste of caramel apple,” said Tony Shurman, director of marketing. “New Pebbles Boulders brings even bigger Flintstone fun to the table each morning.”

Post said the caramel apple flavor is the first in a series of limited-edition Pebbles Boulders flavors that will be launched throughout the year.