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3.  It needs the light band in the middle where the donut floats where you cook it.

Am I missing anything else important?

Depends on the doughnut - we get ours from Krispy Kreme and they are pretty elaborate.

For linear reflections, I go with Anisotropic() with u_highlight_size 20 times greater than v_highlight_size. But BB will have a much better suggestion for doughnuts...

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks