McDonald's (MCD) is performing a "limited test" with burgers made out of fresh beef at 14 Dallas locations according to company spokeswoman Lisa McComb, per a report via CNN Money. The testing has been going on since November without any advertising. The fresh beef is only being used on McDonald’s quarter pounder patties. The burgers that use those patties are the quarter pounder with cheese, the double quarter pounder with cheese, the bacon clubhouse, and the homestyle burger – a regional product that is only available in the Dallas-Fort Worth area. Made with ????% real beef and a lil somer-salt & pepper. pic.twitter.com/ldJbMJXhLK— McDonald's (@McDonalds) https://twitter.com/McDonalds/status/731091626991484928!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); McDonald's typically serves hamburger patties that have been “flash frozen.” According to McDonald's website, “Flash freezing is when beef is ground fresh and then quickly frozen to seal in fresh favor.” The burgers are flash frozen by suppliers and are generally grilled up at a restaurant two or three weeks after. “McComb said it's too early to tell whether fresh beef will become a permanent ingredient in the McDonald's menu, or if it will expand to other restaurants,” wrote CNN Money. McDonald's often rolls out various experimental menu items tailored to regional tastes. For example, the company is testing Gilroy Garlic Fries in some of its San Francisco restaurants. The company is also testing a low-calorie breakfast menu at 800 restaurants in Southern California, using egg whites, Chobani Greek Yogurt, and kale. Back in September 2015, McDonald announced that the company was switching over to cage-free eggs for approximately 16,000 of its restaurants, a process that will take about 10 years. McDonald’s has a Zacks Rank #3 (Hold). Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report MCDONALDS CORP (MCD): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research