How many mg of caffeine are in a red rose tea bag?
                                
                                
                                •
                                
                                
                        
                                    
                                    5 min read                                
                            
                                While the amount of caffeine in a cup can vary, the average 8-oz. cup of Red Rose Black Tea contains between 25-40mg of caffeine, according to the Red Rose Tea website. However, this is not a fixed number and depends on several factors that influence the final brew.