There are many synonyms that can be used to describe the "first taste" of something. Some of these include initial sampling, early impression, preliminary flavor, primary savor, and introductory palate. Other synonyms could include the first sip, preview of flavor, initial impression, and early taste. The idea behind these phrases is to convey the experience of trying something new or different for the first time, and to express the initial reaction to the flavor. Whether it's a new dish at a restaurant or a new flavor of ice cream, the "first taste" can be an exciting and memorable experience.