Find recipes for Slow-Cooked Ham and other Course recipes. Get all the best recipes at . Recipe directions: In a bowl, combine the brown sugar, mustard, horseradish and 2 tablespoons cola; mix well. Rub over ham. Place in a 5-qt. slow cooker; pour remaining cola over ham. Cover and cook on low for 8-10 hours or until a meat thermometer reads 140°.