Combine first 5 ingredients in a small bowl. Rub sugar mixture evenly over steak; let stand 10 minutes. Place steak on a grill rack coated with cooking spray; cook 4 minutes on each side or until desired degree of doneness. Let stand 10 minutes; cut diagonally across grain into thin slices. Serve with lime wedges and tortillas. Garnish each serving with cilantro leaves, if desired.
Made to directions, Liked the flavors that came thru on the thin slices but were we to make again would reduce the sugar maybe by half? Grilled some red onion & bell pepper for the tacos. Served with CL's avocado & tomato salad and some black refried beans.
We found this WAY too sweet, although we don't eat a lot of sugar. I don't think I'll make this again, but if I did I would use less sugar. (I used ancho chili powder instead of chipotle chili powder because we don't like chipotle flavor and it's what I had on hand, so maybe that made a difference. Still seems like it would have been too sweet though.)
Wow, wow this is excellent! The rub is a wonderful sweet-smoky combination with just a little heat; paired with this very tender cut of meat--it's perfect! My husband raved that I need to make this again when his parents come to town next weekend. We served it over salad greens with crumbled blue cheese, tomatoes, etc., but looking back, I would serve it on its own next time to really savor the flavor of the rub. Will definitely make again!