The difference between a regular stout and an Oatmeal Stout lies in the addition of oats during the brewing process. Oats are added to the mash, which is a mixture of malted grains and hot water, and this addition gives the Oatmeal Stout its unique characteristics.
One of the main differences is the texture of the beer. The inclusion of oats gives the Oatmeal Stout a silkier and smoother mouthfeel compared to a traditional stout. The oats contribute to a fuller-bodied beer with a creamy and velvety texture. This creates a more indulgent drinking experience, as the beer feels luxurious on the palate.
In terms of flavor, the Oatmeal Stout often exhibits a greater malty sweetness compared to a regular stout. The oats contribute to a slightly nutty and bready flavor profile, depending on the proportion of oats used in the recipe. This adds depth and complexity to the beer, enhancing the overall taste experience.
The use of oats also affects the appearance of the beer. Oatmeal Stouts tend to have a thick and creamy head, which adds to the visual appeal of the beer. The head retention is often better in Oatmeal Stouts, resulting in a more visually pleasing pint.
Additionally, the oats can also contribute to the overall aroma of the beer. While stouts already have a rich and roasted aroma, the addition of oats can bring subtle hints of toasted oats or oatmeal to the nose. This can vary depending on the specific recipe and brewing techniques used.
It's worth noting that not all stouts are Oatmeal Stouts. Traditional stouts can have their own distinct characteristics, such as a stronger emphasis on roasted malt flavors or a more bitter profile. Oatmeal Stouts, on the other hand, are specifically brewed to incorporate oats into the recipe, leading to a different flavor and texture profile.
The key differences between a stout and an Oatmeal Stout lie in the addition of oats during the brewing process. Oatmeal Stouts have a smoother and silkier texture, a greater malty sweetness, and a flavor profile that can include nutty and bready notes. The oats also contribute to a thicker and creamier head, as well as subtle oatmeal aromas. These differences make the Oatmeal Stout a unique and enjoyable variation of the traditional stout style.