Oatmeal stout is a style of sweet stout that uses oatmeal, which adds a silky-smooth mouth feel. It is generally medium to full-bodied, and the flavor and hop character vary due to process and recipe.
This smoothness comes from the high content of proteins, lipids (includes fats and waxes), and gums of the oats.
Here are the Top 5 rated Oatmeal Stouts from the Beeradvocate :
1) Samuel Smith's Oatmeal Stout from Samuel Smith's Old Brewery (Tadcaster)
2) Shakespreare Oatmeal Stout from Rogue Brewery (Brewers on the Bay)
3) Barney Flats Oatmeal Stout from Anderson Valley Brewing Company
4) Young's Oatmeal Stout from Wells & Young's Ltd.
5) St-Ambroise Oatmeal Stout from McAuslan Brewing