I brewed an Espresso Stout using one can of Cooper's Original Stout, 3.0 Lb of Munton's dark DME, 1.0 lb of flaked barley (hoping to thicken the head retention) and 5 oz of espresso coffee. I steep the barley in 1.5 gal at 155 for 30 minutes, and then rinsed with 32 oz of boiling water. Brought...