As an expert sommelier and brewer, I can tell you that Captain Morgan, like many mass-market rums, is known for its sweetness. This sweetness can be attributed to several factors in the production process.
Firstly, the base ingredients used to make rum play a significant role in its sweetness. Most rums are made from molasses or sugar cane juice (known as rhum agricole). These sources of sugar provide a natural sweetness to the spirit. Molasses, in particular, is a byproduct of the sugar refining process and is already quite sweet. So, when it is fermented and distilled into rum, this inherent sweetness is carried over into the final product.
Additionally, during the fermentation process, some rums, including Captain Morgan, may have sugar added. This is often done to enhance the flavor profile and make the rum more palatable, especially for those who prefer sweeter spirits. The added sugar can help balance out any harsh or bitter notes and create a smoother, more enjoyable drinking experience.
It's worth mentioning that the addition of sugar during fermentation is not unique to Captain Morgan. Many mass-market rums employ this technique to cater to a broader consumer base and appeal to those who prefer sweeter drinks. However, it is important to note that not all rums undergo this process, and there are plenty of rums available that have little to no added sugar.
Furthermore, the sweetness of Captain Morgan can also be attributed to the aging process. Some of their expressions, such as Captain Morgan Private Stock, are aged in oak barrels. During this aging period, the rum may interact with the wood, absorbing flavors and sweetness from the oak. This can contribute to the overall sweetness of the final product.
In my personal experience, I have found that Captain Morgan rums tend to have a noticeably sweet profile compared to other brands. The sweetness is often prominent, and while it may be pleasing to those with a preference for sweeter spirits, it may not appeal to those who prefer a drier or more complex flavor profile.
To summarize, Captain Morgan rums are sweet due to various factors. The use of molasses or sugar cane as the base ingredient, the addition of sugar during fermentation, and the aging process all contribute to the overall sweetness of the final product. While this sweetness may be enjoyed by some, it's important to note that there are other rums available with different flavor profiles for those who prefer a less sweet experience.