As an expert sommelier and brewer, I can confidently say that alcohol does not absorb into ice cubes. When ice is added to a drink, such as a cocktail or a spirit on the rocks, the ratios of the spirits and the alcohol content will remain the same. The ice itself does not absorb the alcohol molecules.
Instead, what happens when ice is added to a drink is that the ice lowers the proof per volume. This means that the overall alcohol content in the drink may be slightly diluted, but the amount of alcohol present remains the same. The ice essentially takes up space in the glass, displacing some of the liquid and reducing the concentration of alcohol.
The reason why adding ice can make spirits smoother to drink is because it lowers the temperature of the drink. Cold temperatures can help to numb the taste buds slightly, making the alcohol flavor less intense. This can be especially beneficial when enjoying stronger spirits, as it allows for a more enjoyable and balanced drinking experience.
I have personally experienced this phenomenon many times while enjoying a glass of whiskey. Adding a few ice cubes to the glass not only chills the drink but also helps to mellow out the flavors and aromas. The ice slowly melts, gradually diluting the whiskey and making it easier to sip.
It's important to note that the amount of dilution will depend on factors such as the size of the ice cubes and the rate at which they melt. Using larger ice cubes or even ice spheres can result in slower melting and less dilution. On the other hand, smaller ice cubes or crushed ice will melt more quickly and potentially dilute the drink more.
To maintain the desired alcohol content while still enjoying the benefits of chilled and smoother spirits, some people opt for alternative methods such as using whiskey stones or stainless steel chilling balls. These items can be pre-chilled and added to the drink to lower the temperature without diluting the alcohol.
While alcohol does not absorb into ice cubes, adding ice to a drink can lower the proof per volume and make the spirits smoother to drink. The ice displaces some of the liquid, reducing the concentration of alcohol while maintaining the overall amount. So, next time you want to enjoy a refreshing cocktail or a perfectly chilled spirit, go ahead and add some ice knowing that it won't affect the alcohol content.