Mitchell secured her victory in season 16 by creating the largest cake in Bake Off history, a 1.2-metre showstopper.
Judge Paul Hollywood declared Mitchell the best winner the show has had in a long time.
During her time on the show, Mitchell received two coveted Hollywood handshakes and became only the second contestant to achieve five Star Baker wins.
Mitchell, who has alopecia, expressed pride in representing Scotland and credited her friends, family, and fellow finalists for their support throughout the competition.