Place the olive oil in a medium skillet over medium heat.
Add in the onion, garlic, jalapenos, and salt and saute for 3-5 minutes, stirring occasionally.
Stir in the cumin, chili powder, and paprika and cook for 1 minute.
Remove from heat and pour into a medium bowl. Add the pepper, cilantro, lime juice, and beer. Allow to cool for 15 minutes.
Pour the marinade into a gallon sized zip top baggie along with the short ribs. Refrigerate for 3- 12 hours.
Preheat your grill to medium high heat.
Remove the short ribs from the marinade and discard excess. Pat them dry with a paper towel.
Sear the short ribs for 3-4 minutes per side then transfer to a plate and cover loosely with foil for 5 minutes. Enjoy!