A side-by-side refrigerator includes a cabinet defining fresh food and freezer compartments, each having upper and lower sections which vary in width and volume along with corresponding fresh food and freezer doors that vary in width. The fresh food and freezer compartments are spaced by an offset mullion assembly against which the doors seal. The offset mullion assembly includes a first longitudinal member, a second longitudinal member, a brace having first and second legs and a laterally extending portion and a cosmetic cover. The offset mullion assembly provides strength to the cabinet while providing an aesthetically pleasing and uniform sealing surface for the fresh food and freezer doors.