American-style imperial porters are black in color. No roast barley or strong burnt/astringent black malt character should be perceived. Medium malt, caramel and cocoa-like sweetness. Hop bitterness is perceived at a medium-low to medium level. Hop flavor and aroma may vary from being low to medium-high. This is a full bodied beer. Ale-like fruity esters should be evident but not overpowering and compliment hop character and malt derived sweetness. Diacetyl (butterscotch) levels should be absent.