My first impressions are:
the photo needs a small clockwise rotation. The glass of milk seems to be on a slant.
the shadow appears too dark as the image is about lightness and subtle tones and colours. A small reflector could bounce light into this area at the picture taking stage.
the front of the cake has a granular look to it. This may be caused by sharpening the whole photo rather than targeting the sharpening ( using a layer mask ) to just the in focus areas. This will then allow the OOF parts of the image to remain soft and blurred with no sharpening artifacts or halos.
The small area of b/g showing to the very left of the glass of milk and just above the cake seems intrusive to me. Perhaps you could try to crop this out to see if it improves the photo.
I can't make up my mind about the cake's reflection and whether it is a necessary part in the image.
The highlights on the cake decoration seem to be blown out. Greater control of the exposure of this area may improve this aspect.
A slight vignette at the top of the photo could strengthen the look of this photo.
This is only an opinion and not meant to offend.