Ribs: Fit rack inside large roasting pan or rimmed baking sheet. Using knife, remove membranes from bone side of ribs (this step is very important for tender ribs). Pat ribs dry with paper towel; place on rack with meat side up.
Combine sugar, coffee granules, salt, garlic powder, coriander, pepper and cocoa in coffee or spice grinder; cover. Process until smooth.
Lightly rub ribs with oil. Sprinkle with rub mixture, pressing gently to help it adhere to the ribs. Let stand at room temperature for no more than 1 hour.
Heat oven to 250 degrees F. Pour beer into bottom of roasting pan. Cover pan with foil; bake for 4 to 5 hours (this will be long enough for the meat to be very tender, but not falling off the bones). Prepare sauce during the last 30 minutes of baking.
Heat grill. Grill ribs over medium flame, turning once, for 5 minutes. Brush with sauce during grilling.
Let ribs rest for 10 minutes before serving.
BBQ Sauce: Heat oil in medium saucepan over medium heat. Add onion; cook for about 3 minutes or until tender.
Add ketchup, vinegar, brown sugar and bouillon. Stir until sugar and bouillon are dissolved.
Stir in mustard, chili powder and adobo sauce. Cover; cook for 30 minutes. The sauce will thicken as it simmers.
Double or triple the spice rub and store in a tightly sealed container in a cool, dry place. It will remain fresh for up to 1 month. Use 2 to 3 teaspoons rub per pound of meat. Rub is also great on pork chops, pork tenderloin, skinless chicken breasts and salmon fillets!