In my experience as a sommelier and brewer, I have to say that I have never come across the taste of bananas in a Jack and Coke. However, taste is subjective, and everyone's palate is different, so it is possible that some people may perceive a hint of banana in this particular combination.
When it comes to the classic combination of Jack Daniel's Tennessee Whiskey and Coca-Cola, the dominant flavors that typically come to mind are the rich caramel notes of the whiskey combined with the sweet and slightly acidic taste of the cola. These flavors work harmoniously together to create a well-balanced and enjoyable drink.
That being said, it's important to note that taste can be influenced by various factors such as personal preferences, individual sensitivities, and even environmental conditions. For example, the lingering smell of banana peels in your trash bin may have subconsciously affected your perception of the flavors in the drink.
It's also worth mentioning that Jack Daniel's is known for its unique charcoal mellowing process, which imparts a smooth and distinct character to the whiskey. This process involves filtering the spirit through charcoal before aging it in oak barrels. This could potentially contribute to the complexity of flavors in the whiskey, but again, banana is not a typical flavor associated with Jack Daniel's.
In terms of personal experience, I have enjoyed many Jack and Cokes over the years and have never encountered a strong banana flavor. However, taste can be subjective, and it's possible that some individuals may perceive different flavors or aromas that others do not.
While I have not personally experienced a banana flavor in a Jack and Coke, taste is subjective, and everyone's palate is unique. If you find yourself perceiving a banana-like taste in your drink, it could be influenced by various factors such as personal preferences, sensitivities, or even the environment in which you are consuming the beverage. Ultimately, it's important to trust your own taste buds and enjoy your drink in a way that suits your individual preferences.