Wedding... Chef makes no wedding cake?

I find it really variable. Sometimes I hire a chef and I get masses of mac and cheese for my upscale wedding, and no cake. Other times they'll make about 5 cakes and no other actual food. I've found it's always best to have a sim make a cake beforehand and put it in their inventory, and then you can use it in any lot. I've also found that if you put the wedding topper on before you put it in their inventory, it'll stop sims from autonomously eating a slice of cake before you've had a chance to use it for your event!