When you think of a french themed birthday what cake flavor(and filling do you think of. Why am I drawing a blank??

French vanilla. Ganache. Some kind of cream filling.

A french garden would be pretty as the cake decor.

I just saw a cake on here with the eifel tower that was cool.

The French tricolor flag, red/white/blue? Famous landmarks/buildings, Provençal theme with flowers/lavender?

Flavors I would go with French vanilla, ganache, pastry crème....Whimsical Bakehouse has a very good French custard reicpe. HTH.

Happy Birthday in French is Bonne Fete ... put an accent on the first E in Fete. It's a circonflex shaped like a triangle without the bottom line.
How about a table top with french bread and a bottle of wine?

maybe a lil bistro theme cake or like a loaf of french bread and a brick of cheese and a bottle of wine?

fleur de lis

Maybe a pink champagne cake and filling.