Preheat oven 350 F
Cream egg and sugar, then add in margarine, mix with medium power for another 1-2 minutes or until blended well.
Pour in coconut milk and grated cassava, using spatula, mix well. Then add in raisins.
Take a sum of batter, add in pandan paste or just green food coloring.
Cut baking paper or wax paper, and line the bottom part of muffin mold, grease paper and side of mold.
Pour a sum of green batter followed with white batter (or you can do white first then green)
Bake for 15 minutes. Meanwhile, mix topping well. After 15 minutes, take out mold from the oven and spread topping evenly on each cake.
Turn on the broiler
Placed topped cake and broil for only 1-2 minutes or until slightly browned, then turn off broiler, turn back on the oven.
Bake for 20-30 minutes more or until cooked.
Wait until cake totally cool down before removing from muffin tin.