NEEWER 32 Inch/80 Centimeter Light Reflector Light Diffuser 5 in 1 Collapsible Multi Disc with Bag - Translucent, Silver, Gold, White, and Black for Studio Photography Lighting and Outdoor Lighting

Cleaner plates (looks like a few are scratched or dirty), cleaner backgrounds (no one wants to see your carpet lol). Looks like you're using natural light from a window which is good, but it could use a bit of back lighting. Since you have a nice natural light source you can buy a reflector to reflect some of that light to the backside. You shouldn't need a large one since you're just doing cakes, so you're only looking at $20-$40 depending on the size.