Which beer type is known for having a smoother flavor due to its production process?

Lager is known for having a smoother flavor profile primarily due to its fermentation process. Lagers undergo a cool fermentation process with bottom-fermenting yeast, which results in a more refined and clean taste compared to ales. The yeast used in lagers works best at lower temperatures and tends to produce fewer esters and phenols—compounds that can contribute fruity or spicy flavors—yielding a more straightforward malt and hop character.

Additionally, lagers are often conditioned for longer periods, which allows for unwanted flavors to dissipate, further enhancing their smoothness. This extended lagering process contributes to the crisp, refreshing finish that is characteristic of this beer style.

In contrast, stouts and porters, both of which are ales, typically exhibit richer and bolder flavor profiles due to the use of roasted malts and the warmer fermentation conditions, leading to more complex taste experiences. Wheat beers can also be smooth but often showcase a different profile with hints of fruitiness or spice, primarily attributed to the wheat and yeast used in their production. Thus, it's the unique brewing conditions of lagers that distinguish their smooth flavor.