I have a request for a cake for a husband and wife duel birthday celebration. They're in their 30s. Something relatively simple.
You can't go wrong with polka dots. Here's a cake that is simple but beautiful. The colors are equally masculine and feminine. You can do a flower on the side for her and do circles on wires in the colors and put both there names on the top and Happy birthday on the board.
That is a beautiful cake!!!!!!!!
Another possibility is to make 2 seperate cakes - using one layer each, put side-by-side.
Maybe these will spark an idea for you:
http://cakecentral.com/gallery/1369704 - just showing how to put single layers side by side
http://cakecentral.com/gallery/1340957 - put their names on each diamond (or whatever shape you decide to use) and write the b'day greeting on the cake?
Thanks for the links of the cakes. I would not have thought of side by side! Interesting! Thanks so much!
Or you could do two sides of one cake, one side in her favorite colors and the other in his. See this thread about a double baby shower to see what I mean:
If they are gamers maybe a Scrabble game with their names intersecting (or if thats not possible Happy Birthday across the middle with their names intersecting it) You could spell out words like Thirty, Party, Good Times, etc.