Prepare your banana leaves - Using a sharp knife, strip the leaves from the stalk, be careful not to shred the leaves as they are very delicate. Briefly singe the leaves over an open flame. This should be done just long enough to get them softened. If they begin to curl or spontaneously combust, they are over done. Finally cut the singed leves into 8″ x 8″ squares.
The conkie mixture — Mix the coconut, pumpkin, sweet potato, sugar, spices, almond essence, raisins, flour, corn flour, and salt together thoroughly. With a wooden spoon, stir in the melted butter, shortening and milk and mix until smooth.
Place 2 heaping tablespoons of the mixture onto each banana leaf square, fold the edges to make a neat envelope and tie securely.
Steam the conkies on a rack over boiling water in a large saucepan, or in a steamer, for about 1 hour or until they are firm.