I saw this cake on Pinterest, then went to cake central. The author posted some helpful hints to make it but not the instructions. I know it's basically a yellow cake and buttercream icing but I am looking for more details on how to get the blue center. Anyone?

http://cakecentral.com/gallery/1703278/hidden-flag-cake

I think when I did mine, I google it and found the instructions. I just didnt do as many layers as some. have. I think it looks better with more layers though.

I did a 6 inch blue velvet cake(3 inches tall) (pink velvet but used blue instead) and 12 inch strawberry cake with beet juice and red color. I layer the cake into 1/2 inch layers and a layer of whipped icing so it was not so sweet. I stacked it 3 inches tall and cut the center out and inserted the blue cake. I then did the bottom while the top was in the freezer to make it easier to transfer. I continued with the same layering process and stacked it all together. The top of the cake was blueberries and strawberries in a pretty pattern. It was similar to a berry shortcake.

My DD is trying one like this with the zebra stripe concept as a waving flag. She did the scoop of red then blue and inserted a 6 inch pan in one layer like a heating core and baked the blue cake at the same time. Smells good but not sure of the results yet.

That cake is a great idea and it would make a great impression for a Federal Holiday in the US.

I used a checker board cake separator when I did mine for the blue center section with red batter on the outside.