Prepare BBQ rub as directed. (Below)
Place ribs onto a large cutting board and cut into slices, and then into 1 1/2 inch cubes.
Rub BBQ spice mixture onto all sides of the riblets. Place in a disposable pan or large Ziploc bag. Allow to set in refrigerator for 3 hours to overnight.
Preheat oven to 250 degrees F.
Place riblets into a baking pan if not already in one. Add 1 cup water to bottom of the pan. Cover with aluminum foil, and bake for 1 1/2 hours.
Prepare BBQ sauce. (Below)
Heat a grill pan (or grill) to a medium heat. Place riblets in grill pan and brush with BBQ sauce. Turn frequently with tongs and brush with additional BBQ sauce when turning.
If using grill, place on aluminum foil, sprayed with no stick cooking spray.
Cook for approx. 20 minutes total. Internal temperature should be 160 degrees.
Remove from heat and cover with foil to rest 5 minutes.
Transfer to serving platter and serve with additional sauce on the side.