Organic shapes in parametric CAD usually mean a fight: hacky boolean lumps, or a round trip through a sculpting app and back, with mesh cleanup waiting at the end. This build takes a different route. The maker sculpted a donut with dripping icing entirely inside FreeCAD, using the SubD Modeler workbench on a dev build, version 27.1.0dev. In my view that is the interesting part: the whole thing stays in one environment from cage to finished solid.
The technique relies on manipulating the polygonal cage to shape organic surfaces. The tools panel carries Extrude, Bevel, Inset, Knife (loop), Bridge and Subdivide, and in Edit mode a blue control mesh sits over the icing layer while the maker works it. Flipping from Edit mode to Object mode hides that wireframe cage and shows the smooth shaded result: a yellowish-tan body under brown frosting that drips down the sides. The camera orbit and close zooms show the surfaces holding up from several angles.
Two details stand out to me. First, the maker converted the model to a solid and fused it in PartDesign, and explained that a solid face can start an organic shape which is then fused back into one body. That seems like a genuinely useful bridge between precise CAD and freeform work. Second, the maker keeps their own macros as text in the upper corner of the interface, and argues that granular undo and redo beyond the main Undo function is fundamental to trial-and-error modeling. I think that is a fair point for cage editing.
The open question is the interface itself. Some feel the workbench blends too much of Blender into FreeCAD and dislike the mismatch, while the maker counters that Blender feels overwhelming for infrequent users and that exporting geometry between the two does not work well. Whether the trade is worth it seems to depend on how often you need organic forms.