Spicy Mexican Shredded Pork Tostadas (Tinga)

From America's Test Kitchen Season 11: Tostadas and Empanadas

True Mexican shredded pork, or tinga, is a far cry from the bland burrito-joint version often found languishing on steam tables. We set out to perfect the methods that give tinga its characteristic crisp texture and smoky tomato flavor. We wanted tender, full-flavored Mexican shredded pork that we could serve atop crisp corn tortillas or spoon into taco shells.

We trimmed and cubed a Boston butt (chosen for its good marbling and little sinew), then simmered the pieces in water that we flavored with garlic, thyme, and onion. Once the pork was tender, we drained the meat (reserving some of the cooking liquid for the sauce) and returned it to the pot to shred. The meat was so tender, it fell apart with nothing more than the pressure of a potato masher. We then sautéed the meat in a hot frying pan along with the requisite additions of finely chopped onion and oregano. Minutes later, the pork had developed crackling edges crisp enough to survive the final step of simmering in tomato sauce. Unlike American barbecue with its sweet and tangy barbecue sauce, tinga relies on a complex smoke-flavored tomato sauce. For our version, we diluted canned tomato sauce with the reserved flavorful cooking liquid from the pork and added bay leaves for herbal complexity. And for tinga’s all-important smokiness, we turned to ground chipotle powder, which is a little harder to find than the other option of canned chipotle chiles in adobo sauce, but is has a deeper, more complex flavor.