**No—you don’t have a five-minute deadline.** Espresso changes as it sits, but there’s no universal point when it becomes “dead” or too bitter. A well-prepared shot can still be enjoyable after five minutes. [Clive Coffee’s explanation](https://clivecoffee.com/blogs/learn/is-your-espresso-dying-while-you-wait) addresses this directly.

During those minutes, the espresso cools, its crema breaks down, and some aroma escapes. Cooling also changes the balance of flavors you perceive; it can make pleasant flavors clearer or make harshness more noticeable. It doesn’t necessarily make every coffee more bitter. A [2019 sensory study of brewed coffee](https://www.sciencedirect.com/science/article/pii/S0963996918309761) found substantial differences with serving temperature, although it wasn’t specifically an espresso study.

As a practical guide, **start sipping once it’s comfortably cool and enjoy it over the next few minutes**. Treat that as a serving preference, not an expiration time.

For your tasting, the barista had a reasonable concern about consistency: a fresh, hot shot and a five-minute-old shot offer different sensory experiences. Compare shots at similar temperatures and similar times after brewing. Tasting again as they cool can also tell you something useful about the coffee.