"Have it your way" is Burger King's longtime slogan but McDonald's is the one testing build-your-own-burger concept. 

According to Burger Business, McDonald's is now testing build-your-own style Quarter Pounders. The trial run is taking place in Southern California, according to Orange County Register.

At a recently remodeled restaurant Laguna Niguel, Calif., McDonald's staff welcome customers at the entrance. The restaurant offers three new high-price specialty burgers as well as the option to choose custom toppings from the list on an iPad menu. The OCR reports that the test is taking place in an Illinois McDonald's as well.

The participating locations are offering 20 toppings and spreads, including white Cheddar, guacamole, caramelized onions, grilled mushrooms, creamy garlic sauce, and applewood-smoke bacon. The burgers have been given the slogan, "Real. Freshly Grilled. One of a Kind." The build-your-own burgers still feature the typical Quarter Pounder patty but retail at $5.79 a piece.

"[We hear from customers] what they expect from McDonald's in terms of the overall restaurant experience and their ability to further customize their menu choices,"  a McDonald's spokesperson told the OCR In other words. "Will our customers give us permission to go to BYO and $6 burgers?" 

McDonalds is not alone in testing the new concept. Other eateries inlude chains such as The Counter, Smashburger, Fuddruckers, Bagger Dave's Burger Tavern, Bad Daddy's Burger Bar and many more.  

According to Business Insider, Technomic's latest Burger Consumer Trend Report finds that 64 percent of the 653 adults polled say it is important to be able to customize toppings on their burger. That's up from 55 percent in a similar study just two years ago. 

Additionally, 64 percent called build-your-own-burger concepts "highly appealing."

Would you try a build-your-own burger from McDonald's?