[COUPONSAREMYGAM]

My first thought was that the tulip as your background image while fitting with the color scheme really does not go with the cooking theme. Perhaps something that is more fitting?

The pink color is very girly, but if you are trying to attract a woman userbase that would work but might scare off any males. Perhaps something more neutral in color that is less gender identifying?

You have 3 main forums, Rules (good), The kitchen, and The Dieters Plan. I would suggest building out some other forums for other cooking discussion as well. Perhaps some place for reviewing of kitchen gadgets tools, some sort of off topic area as well as I think members like to discuss other things as well and an off topic area will give them a area where they can feel like they are part of a community.

In thinking about it you have to think about all the other cooking related sites out there and how you can provide something that the others do not have.