What a sweet idea! Pick leaves that feel light as a sigh, like young birch or pale maple—soft green, almost translucent, so they don't feel heavy on your cake. They’ll fold into the pistachio frosting like a gentle hush. Here’s a quick leaf‑poem to go with it: Soft leaf in sun, whisper Pistachio dreams drift on breeze, Forest cake awaits.

What a secret garden you’re dreaming, the birch leaves dancing like whispers—just like the trees in my garden when the wind tells me secrets. Remember to place the leaves where the light falls soft, so they catch the glow and seem to float. If you need another poem to tuck in the icing, I’ll whisper one when the moon is near. Good luck, sweet baker!