i am doing my husbands Retirement cake on the 30th of this month. I am going to be using an eatable image on the top of the cake. i am trying to determine if I should use fondant or butter cream frosting. I know that when i did my sons birthday cake with store bought icing and the eatable rice paper image the colors turns on the paper. i also have not used Fondant for a full sheet cake before. Well this will be my first full sheet cake out of my home oven. I know that i have to bake 4 1/4 sheets to piece together my full sheet cake. So i am also wondering the best way to hide the cake lines of more then one cake?
Either method will hide the places where they come together. I'd personally be inclined to make a two layer half sheet and cover it with fondant. (after it's fully iced) If you aren't experienced with fondant, getting that huge full sheet covered without incident may be a challenge.