In a move to up the ante in the fast food wars, the nations number two hamburger restaurant is rolling out a new, "improved" version of their french fries.

Burger King Corp, the second largest hamburger chain, has changed its french fry recipe for the first time since 1998 as competition from upstarts and traditional fast-food rivals mounts.

Burger King's changes follow recent changes from Wendy's - not to mention recent trends from up-starts like Five Guys, which utilize thicker fries and potato skins for texture and taste.

Burger King said it made the new fries thicker, reduced sodium and added a coating that makes them crisper and keeps them hotter longer.

The fries, now a bit wider in diameter than a No. 2 pencil, will be available in its more than 7,000 North American Burger King restaurants by December 5. Prices remain the same.

BK's move seeks to not only make them bigger, but healthier at the same time.

Burger King said the new fries have 20 percent less sodium than their predecessors. The smallest, $1 portion has 330 mg of sodium and 240 calories. The fries are cooked in trans fat-free vegetable oil and do not contain animal products, Burger King said.

Burger King launches thicker fries amid competition | Reuters.