For those new to smoking meat, the 3-2-1 rule is an easy-to-remember method that helps ensure ribs that are fully and evenly cooked, yet tender and full of flavor.
Then, remove the ribs and wrap them in aluminum foil or butcher paper. Adding liquid like apple juice, honey, and brown sugar at this stage can make the ribs more tender.
Unwrapping the ribs for the final hour reduces the sauce and helps brown the ribs' edges, resulting in a pink ring inside the edges of the meat, which signals well-smoked meat.
Plan ahead to give the ribs enough time to cook, and consider the type of ribs while using this method — it works best for spare ribs, while baby back ribs could be overdone.