Combine a classic vanilla or chocolate (with vanilla buttercream) with the latest trends: a unique pattern of swirls or liquor pipettes, rainbow theme, happy birthday text, meringue, you name it. Or why not add cookies, chocolate bars, rasped chocolate and bonbons? Ok, maybe a chocolate bomb isn't for everyone, but you can customize to your heart's content.
Or not, and let us decide and we will go and experiment.
Whatever you decide, you will get something you might want to frame rather than eat! (but do eat them please, they're delicious)