The good thing about this indoor method of cooking ribs is you cook them low and slow, so the kitchen doesn't heat up and the meat remains nice and tender.
Preheat oven to 250ºF
Add 1 tablespoon flour to oven bag; shake bag until flour has coated interior
Add ribs to oven bag
Add orange juice and remaining ingredients; massage ingredients to coat ribs
Refrigerate for an hour
Remove from refrigerator; cut slits into the top of the baking bag
Place bag on baking dish; tuck the sides of the bag into the pan so they're not overhanging the baking dish
Bake for 4 hours at 250ºF
Remove ribs from oven; carefully cut away oven bag and slide ribs onto baking dish
Turn oven to broil
Pour barbecue sauce on ribs; coat both sides
Place ribs under broiler to desired crispness
Remove from heat; allow to rest 10 minutes
Slice ribs individually, or in sections (3 ribs per person) with knife.