Start by trimming excess fat and removing the thin membrane on the back of the ribs. This step helps the seasoning absorb better and ensures tender results. Pat the ribs dry before seasoning or marinating. Proper preparation sets the foundation for great flavor.
In a bowl, combine brown sugar, chile sauce, ketchup, soy sauce, Worcestershire sauce, rum (if using), garlic, mustard, and black pepper. Whisk until smooth and well blended. The mixture should look thick and glossy. This sauce gives the ribs their signature sweet and savory flavor.
Preheat the oven to 350°F (175°C). Place ribs in a foil-lined pan and coat with sauce. Cover tightly with foil to keep moisture inside and bake until tender. Slow cooking ensures juicy, fall-off-the-bone ribs.
Remove the foil during the last stage of cooking. Brush generously with additional sauce. Return to the oven or place on the grill to caramelize the glaze. This step creates that sticky barbecue finish everyone loves.