Welcome to the Cake Decorators Q&A
What is formcore?
I'm seeing a lot of people using foamcore. Is it to replace cake cards? Anyone used it got experience?
As far as I know, these are strong polystyrene boards which are used as base boards. If using in between tiers they need to be covered up to make them food grade. I've had a quick scout in google and there does appear to be a fair bit of information on the product. It's worth reading through all you can to be best informed.