In the past, the term “stout” referred to a beer that was extra strong. Thus, we had Porter, and we had Stout Porter, which eventually became just Stout for short. Interestingly, what is now known as Stout is oftentimes rather low in alcoholic content while Porters tend to have an ABV of 5.5% to 6% or more. But historically, Stout was any beer that was as strong as the drinkers that were expected to consume it.
To make this brown stout, start with the ingredients for cookies: wheat malt, oats, sultana raisins. Add to this Maris Otter base malt, crystal malt, a touch of caramel rye malt, and some Cara Munich. Mash at a fairly high temperature to encourage the production of unfermentable sugars that will keep the brew more sweet and full-bodied. Magnum and Amarillo hops are assertive without being overpowering. Add golden syrup at the end of the boil to contribute more caramel flavors. Ferment with a fruity yeast such as London Ale. Soak sultanas in dark rum until they are soft, then whirl the mixture in a blender. Add some to the primary fermenter, and another batch to the secondary, along with a hint of vanilla extract.
The result is not so much a beer that tastes like oatmeal raisin cookies as it is an oatmeal raisin cookie that tastes like beer.