How to get McDonald's special sauce for Big Macs in dipping cups

McDonald's will be serving its Big Mac sauce-- likewise called secret sauce and special sauce-- in condiment dipping cups for a restricted time.

You need to order through the McDonald's app to get the cups, according to a press release from the junk food giant.

The promo will begin Thursday, April 27 at getting involved U.S. areas and run as long as supplies last. The chain followed a similar strategy last year when it quickly restored its Szechuan Sauce, a cult favorite thanks to a "Rick and Morty" cartoon.

The sauce will be delivered in a silver and blue cup, the colors of Big Mac wrapping when the burger was introduced in 1968.

Previously this week, McDonald's revealed that it has actually updated its burger recipes and will be spreading out more sauce on its Big Macs.

Information: mcdonalds.com