Brie cheese can spoil over time and become unsafe to consume. Brie can be safely stored in the refrigerator for 1 week past the expiration date.
Brie is classified as a semi-soft cheese and its shelf life is shorter than that of hard cheese. The shelf life of this type of cheese is determined by the method of processing, how it is stored, and the date it was packaged.
Brie that has spoiled often contains a bluish-green mold and may darken in color and harden in texture. Bad cheese should be discarded to prevent food borne illnesses.
Semi-soft cheeses should be stored in the refrigerator and not left out at room temperature for long periods of time.