Hi everybody! I heard of a method for filling cakes where you cut out a circle in the middle of the cake and then put the filling in it and the cake around the edge serves as a dam.  What is this method called and has anyone tried it, does it work? is there any tutorials around to show how to do this? Thanks!!

I've heard of it but haven't tried it I'm curious too

AI haven't heard or seen it...but I have to say it sounds like a lot of extra work for a problem with a relatively easy solution. Using the buttercream dam is super quick and easy

ATotally agree with MorganChampagne

No real name for it. 

You can crumb coat the top of the layer, cut out an amount of the cake--say a 9.5" circle out of a 10" round--excavate that to the depth you want your filling to be [and make the filling level with the thin lip of cake], fill it, and place the next layer on it.  Instead of an icing dam, you have a cake dam.

In this pic, the blue ring would be the "cake dam" [that would extend all the way to the outer edge of the cake] instead of icing:

This is a real cake cut this way [personally, I think the cake dam is pretty wide and I'd do it about half that width.  I'd also crumb coat the top of the cake first so that I wouldn't have to do just the thin lip after it's filled]: