Sandi announced her departure from the programme in January this year.
The comedian said spending time with Noel and judges, Prue Leith and Paul Hollywood was one of the “great pleasures” of her life.
She added in a statement on Twitter: “Bake Off is a wonderful programme which has already proved it can happily withstand a change of hosting personnel.
“The reason for that, of course, is the true stars of the show are the bakers themselves. I wish everyone well.”
The Great British Bake Off final airs next Tuesday on Channel 4 from 8pm.