Preheat the oven to 325 degrees F. Line a rimmed baking sheet with foil.
In a small food processor, puree the BBQ sauce with the cilantro, garlic cloves, and jalapeno until smooth.
Arrange the ribs on the baking sheet and slather with half the BBQ sauce. Make sure you get it in every nook and cranny. Lay the ribs bone-side down and cover tightly with foil. Bake in the middle of oven for 2 hours, until the ribs are tender but not completely falling off the bone. Remove the foil and glaze the ribs with another coat of BBQ sauce. Raise the oven temperature to 400 degrees and bake the ribs until deeply browned and crusty, about 15 to 20 minutes more. Remove to a cutting board.
Once cool enough to touch, slice the ribs into individual pieces. Serve warm or at room temperature alongside the remaining BBQ sauce.