I’m not sure how to describe the flavor of these. Somewhat like Burger Rings, but not quite, and in triangular chip form. Fortunately Wikipedia comes to the rescue and describes it as X-13D flavor. Which are exactly the words I was looking for.

In 2009, Doritos released some new flavors under the banner Doritos Late Night: Tacos at Midnight and Last Call Jalapeno Popper. They also modified the X-13D flavor as All Nighter Cheeseburger. –  Wikipedia

Thanks Nova!