I think that marketing is a different subject that needs it's own thread. You mention that you want to market to even planners. Corporate, wedding, ????. Who is your market in the brochure?
A Events Coordinator has to handle all the aspects of a program. Be it a wedding, you will offer wedding favors, chocolate centerpieces, and perhaps, you have other things that you can put into your brochure, i.e., chocolate fountain rental? Do you want to be known as the caterer's chocolate company of choice? That is a good slogan, btw. LOL! Do a brochure with that. Tell them what you can do for them. Take a look at what others do, and see what their brochures promise. What can you do that is different? Do you make individually molded items for the bride and groom? Cake toppers? What could you do to make the wedding reception different?
Are you doing corporate gift baskets? Corporate candy bars? Fortune cookies dipped in chocolate that when opened, have wonderful forecasts of the next years sales?
For Valentine's, can you have molds made, or find some vintage ones, and cast them in chocolate? I know that there are Easter bunnies, but, why are there no Cupids? We eat bunnies, and I would gobble up a Cupid! LOL!!! As a matter-of-fact, that is one thing that I am doing. Coming up with my own molds. Very unique and great gift-giving items. I would hope to see more chocolate companies coming up with more molds to fill. That will get you press around Valentine's Day. I know that when I worked for the newspaper, I would wait for the seasonal press releases to be faxed over so that I could include something fun for the Community Page of the Times News that I did production work for. I was not a reporter...just their gopher...hehehehe. But, I learned alot!
Once you know what you want to do, where the market is for you, sit down with them and ask them what they want. Sit down with a few caterer's and ask them what they would love for you to be able to provide them with. They know their needs. Then, sell it to them!