Ideally use traditional Jamaican Sweet Potato which can be obtained at Caribbean food mart. Peel cut the sweet potatoes in halves which allow for better grip for grating. Grate sweet potatoes which traditionally is done by using a manual metal grater. However, if food processor is used, then cut sweet potatoes first in cubes and add to food processor for grating. Place grated sweet potatoes in a large mixing bowl.
Add dark sugar, flour and raisins.
Reconstitute coconut milk powder with water or use tin liquid coconut milk. Best result is with Grace Coconut Powder/liquid. Mix well and add to the sweet potato mixture.
Add melted margarine, nutmeg, salt, cinnamon powder, vanilla, rum, lime juice and browning and mix well.
Transfer mixture into a greased baking tin.
Bake in a pre-heated oven 350 F or 180 degrees C for 1 1/2 - 1 3/4 hours.