Colours in biscuit look a bit cold. Maybe the white background - lots of blues in its shadow, and light is very harsh. I might try to soften fractionally, with more reds in colour balance, less cyan. fractionally soft due to DoF issues, I think (use narrower aperture to reduce issue).
Nice idea for the challenge. I don't particliarly like the greenish hue of the milk on the left side. Otherwise, it is nicely composed and well focused. Now, I think I'll go get me a snack.