In a large glass baking dish whisk together Carne Asada marinade ingredients (jalapeño through black pepper) until combined.
Add skirt steak in a single layer, turning to coat with marinade.
Cover and refrigerate for at least 1 hour, but no longer than 8 hours (longer will begin to break down the meat).
When you're ready to grill: preheat an outdoor grill to medium-high heat.
Grill steaks for 7 to 10 minutes per side, turning once for medium-rare.
Remove steaks and allow to rest for 5 minutes.
Slice thinly across the grain and serve.
