A 'mouth-watering showdown' is an exciting event that is sure to leave a lasting impression on all who attend. However, if you're looking for synonyms that convey the same level of anticipation and excitement, you may consider using phrases like 'show-stopping display', 'sensational face-off', or 'epic battle'. Alternatively, you could try words like 'delightful clash', 'riveting challenge', or 'engaging confrontation'. Whether you're talking about a sports match, cooking competition, or any other type of showdown, these synonyms will help to captivate your readers' attention and leave them eagerly anticipating the outcome.