Hi Chris, it's possible to use Transform >Deform > Flow to do this but it will be a bit tricky. The donut would need to be rebuilt to be just a single surface revolved from a curve with just one segment in it and the base surface would need to be a revolved plane instead of a regular 4 corner point plane.

Instead it might be easier to create some cutting surfaces to cut the donut up and shell the remaining piece to thicken it.

- Michael