I recently made my 1st treasure chest cake and I used rice krispie treats for the top.
I carved the top and put it on its own cake board (measured to be the same size as the bottom). Iced it ib bc and covered with fondant.
The chest was cake, stacked and cut to size.
Really cute cake, good luck!
I would use a bread loaf pan for the chest and two 8" rounds cut in half and turned so the round part is up. Frost inbetween the circles to keep together and then all around the outside. Then cover it in fondant. The chest is basic stacked construction. Either bake them half the size so that you can do four torted layers or torte them by hand. Then add the candy and "jewels" to the top. I would also add a couple of skewes to hold it into place and maybe one down the center into the actual board. I would also skewer the top also.
Hope that helps.
Ok i've not made one before but this is my best guess on how i would approach it...the lid that is..you could either just carve the cake in the shape of the lid freehanded and then cover with fondant or buttercream OR you could bake up lets say two 9" round cakes, cut them down the middle to make a total of four peices and stack them on their sides, cut side down. That would give you a clean domed shape tthen cover as desired. BUT>> if you don't want that much cake you could always do that llid out of foam and cover. HTH
My son wants a treasure chest for his party next week, and it will be my first. Now, he saw this pic, and wants the pirate sitting on it!