This is how I cut the cost of fondant covered cake boards:
1) cover a 10 inch round 1/2 inch thick cake board with fondant.
2) cut a 7 inch circle out of the middle of this and save for another use.
3) top with 8 in cake!
This way you use less fondant. Works for me!
Yep! And once you have it on the board, before you trim the excess away from the edges, roll it out even thinner. The amount used is virtually negligible, even for the biggest boards. Plus, it sets up firmer and is less prone to dings while your working on the cake, or if you happen to cover boards last minute (like me).