What effect does using dark sugars like molasses have in brewing?

The use of dark sugars like molasses in brewing is primarily known for imparting unique flavors to the final product. Dark sugars contain various compounds, such as caramelized sugars, that contribute rich, complex flavors, often described as toasty, chocolatey, or fruity, depending on the amount and type used. These flavors can significantly enhance the character of certain beer styles, such as porters and stouts, making them more appealing and complex.

While it's true that dark sugars impact other brewing aspects, such as potentially reducing yeast activity or contributing to haze in some contexts, these effects are secondary to the primary purpose of adding flavors. The clarity and bitterness of a beer relate more closely to other ingredients like hops and malts than to the use of dark sugars. Thus, the introduction of dark sugars is mainly celebrated for the depth and complexity they bring to the flavor profile of the beer being brewed.