Smokehouse Oven-Baked Back Ribs - cooking recipe

Ingredients

SAUCE
3 tablespoons butter or 3 tablespoons vegetable oil
1 medium onion, finely chopped
2 tablespoons minced fresh garlic (or to taste)
1/4 - 1/2 teaspoon cayenne pepper (or to taste)
1 1/2 cups water
1 1/4 cups ketchup
2/3 cup brown sugar, packed
2/3 cup cider vinegar
1/4 cup light molasses
2 tablespoons Worcestershire sauce
2 teaspoons instant coffee, granules
3 teaspoons prepared yellow mustard
3 teaspoons chili powder
2 teaspoons cumin
1/8 teaspoon cinnamon
1 teaspoon black pepper
salt
RIBS
6 racks of baby-back pork ribs
1/2 cup cider vinegar
1 1/2 tablespoons liquid smoke
RIB RUB
6 tablespoons chili powder
3 tablespoons cumin
2 teaspoons garlic powder
1 1/2 tablespoons onion powder
1/8 teaspoon cayenne pepper
1 tablespoon brown sugar
1/2 teaspoon salt
1/2 teaspoon black pepper

Preparation

FOR THE SAUCE; make 1 day or even up to 7 days ahead, heat butter in a medium saucepan over medium heat; add in onion, garlic and cayenne pepper, saute for about 4 minutes.
Add in all remaining sauce ingredients; bring to a boil, reduce heat and simmer uncovered for about 45 minutes, stirring occasionally, season with salt and more cayenne if desired; cool to room temperature and chill a minimum of 24 hours before using or up to 7 days.
FOR THE RIBS; Remove the membrane on underside of the ribs.
Place ribs in a large roasting pan.
In a bowl mix together cider vinegar and liquid smoke, then brush over both sides of all the ribs; chill for a minimum of 24 hours.
FOR THE RIB RUB; after the 24 hour chilling time, in a bowl mix together chili powder, cumin garlic powder, onion powder, cayenne, brown sugar cumin, salt and black pepper; rub spice mix all over the ribs.
Arrange the ribs meat-side up in a single layer on 2 large baking sheets that have been sprayed with cooking spray.
Roast at 350 degrees for about 1 to 1/1/4 hours (if browning too much cover loosely with foil).
Remove ribs from oven, then brush both sides with about 3/4 cup sauce (that is 3/4 cup for all the ribs) return to oven and roast 10 minutes longer.
After the 10 minutes remove from oven and brush with another 3/4 cup sauce; return to oven for another 10 minutes.
Remove from oven; cover with foil and let rest for 15 minutes.
Cut the ribs between the bones into 3-4 rib sections, and serve with remaining sauce.