Sweet marzipan acorns capture the beauty of fall. The marzipan is tinted pale green with food coloring to mimic the appearance of nuts just picked from the tree; a thin coating of bittersweet chocolate, decorated with sprinkles, crowns each one and balances the marzipan's concentrated sweetness. Place the acorns on pressed leaves for a lovely autumn display, and serve them on a dessert buffet or on platters at guests' tables.