A stout serving is a type of beer that is usually served in a pint glass. A pint is a unit of measurement for liquid volume that is equal to 473 milliliters, and onepint is equal to two pints. Therefore, a stout serving is typically two pints of beer. Stout is a type of dark beer that is usually full-bodied and has a strong flavor. It is often made with roasted malt or barley, hops, water, and yeast.