A native to Japan, China and Korea, Akebia quinata, also known as Chocolate Vine and Five-leaf Akebia, is a deciduous twining climber with chocolate scented three to four sepal flowers. When the purple-brown blooms mature, they become sausage-shaped pods which contain soft, juicy and mildly sweet pulp. The bitter skin is also edible and the leaves are made into tea. The woody stem is used as a traditional medicine in China and the soft young shoots are added in salads or pickled. Being a potentially invasive species, it is recommended to plant it in a pot or to monitor its spread.
Chocolate Mint (Mentha piperita cv. ‘Chocolate’) is a cultivar of the peppermint with lobed bronze-green leaves. It has tall stems that hold a pale purple flower that opens from the bottom up in the summer. Many people say that the scent is a combination of cocoa and peppermint, reminiscent of the confection called Andes Chocolate Mints.
Another deliciously perfumed plant that you can add in your chocolate-scented garden is the Boxleaf azara (Azara microphylla). This small evergreen tree reaches about 15 feet tall and 4 to 6 feet wide. It produces yellow fluffy flowers that smell like white chocolate or vanilla.