Jamba Juice has introduced mini flatbread pizzas to its Hawai'i stores as part of an effort by the smoothie chain to diversify.

The company rolled out what it calls California Flatbreads in 32 local stores last week, making Hawai'i the latest market to add more food offerings under an initiative Jamba Juice launched in June.

Emeryville, Calif.-based Jamba Juice Co. began testing the flatbreads as well as sandwiches, wraps and salads at 222 California stores in June, and since then has been introducing the lineup to other stores in major markets such as New York, Chicago and Seattle.

The company said the new products represent the most significant addition to store menus since Jamba Juice was established in 1990, and are intended to help reverse a nearly two-year decline in average sales for company-owned stores open at least a year.

In Hawai'i, only the flatbreads were introduced because the company hasn't finished assessing the response to the chilled selection of food offerings it calls "Grab and Go."

"We're awaiting full results," said Sherri Rigg, marketing director for JJC Hawaii LLC, a local company operating the 32 Hawai'i stores in partnership with Jamba Juice Co. "We're pretty confident Grab and Go will do well in Hawai'i."

Jamba Juice stores in Hawai'i carry other food items, such as fruit and granola cups, oatmeal, pretzels, cookies, and fruit and nut bread loaves.

The flatbreads are priced from $3.75 to $4.25 and come in four flavors: tomato and artichoke, grilled vegetables, BBQ chicken and four cheese.

One Jamba Juice store at the University of Hawai'i, owned by a different operator, is not included in the flatbread offering.