Taco Bell recently introduced a completely new item, the Double Stacked Taco. It's a hard shell taco wrapped in a flour tortilla with melty cheese and sauce in-between.

Confession: I never had KFC’s Double Down. Before eating fast food became a journalistic concern, the Colonel’s double-stacked chicken fillets with cheese, bacon, and secret sauce sandw… ...

In fact, the earliest known recipe for a taco in the U.S. in English is a hard shell taco; it was in the L.A. Times. You should read the entire oral history of the hardshell taco over at MEL, ...

You can put other stuff inside a crispy taco—it’s just that, outside of Taco Bell, Chipotle, and some old-school Tex-Mex restaurants, it’s hard to find restaurants doing that.

The seasoning-from-a-packet, Cheddar-crammed, hard-shell taco was my childhood introduction to the form — an exotic box kit delivered to my family in France by an American relative.