I have been asked to make a 75th wedding anniversary cake. The couples favorite flavor is lemon. The kind of cake is not the issue. The couple's neice, who is throwing the party, would like a sheet cake and has left the decorating up to me. She really does not know what she would like except Happy 75th Anniversary. Does anyone have any suggestions. I was thinking of making it very simple. A two layer lemon sheet cake with buttercream filling between the layers. Frosted with buttercream, some roses in each of the corners. A silver heart in the middle with the couple's names and then Happy 75th Anniversary. Sounds a little boring to me. Any other ideas you may have will be greatly appreciated. Thanks in advance.

Your cake idea sounds delicious, but the 25th anniversary is silver...those who make it to 75 get diamonds! You could use piping gel sprinkled with Fairy Dust (I love that stuff!) to simulate diamonds. There are sites that sell edible fake gems. Search for 75th Anniversary in the Gallery on this site for ideas. I'm sure you will get lots more suggestions.
HTH
And welcome to CC!

Wow! 75 years that's fantastic!! How "newbie" are you? A very simple idea if you are just starting out, adding a couple of edible image photos on top - one of their wedding photo, one more recent - you can "frame" them in buttercream. You could make a frame with fondant or chocolate (using a mold) to create a bigger impact. People seem to love those on anniversary cakes. Yes, diamond accents! 75 years - wow!!

Oh, I love the idea of a "framed" EI wedding photo...see, I told you you would get more ideas!

Does anyone have a copy of their wedding invitation ? They may not have even had one that long ago, but that would be neat in a "frame" too ....