Petit Four Sec

We're working on a petit four platter, and have to come up with six different types: tarts, bar cookies, macaroons, madeleines, petit four glace, and petit four sec. I've been using Alice's Adventure in Wonderland and the croquet party of the Red Queen as an underlying theme (it hopefully won't be too obvious on my platter). My dry petit four is a cookie that I've done before, with a twist: White pepper in the cookie and nasturtiums picked fresh from my garden as garnish.

I speak severely to my boy,
I beat him when he sneezes;
For he can thoroughly enjoy
The pepper when he pleases!

The original recipe is on epicurious.com (cardamom butter squares). If you want my version, just let me know in the comments and I'll send it to you.