Cook and stir Ingredients B over medium heat until sugar dissolves. Let cool.
Mix Ingredients A and B. Stir well. Strain twice.
Divide batter into 2 portions. Drop either red or green (as desired) colouring into first portion, the other portion remain white or uncoloured.
Heat a 10" x 10" x 12" tin in steamer until water boils.
Pour in a thin layer of uncoloured batter. Steam for 3 minutes.
Alternate with coloured batter (steam for 3 minutes). Repeat for next 10 layers.
Steam 5 minutes for the last 4 layers (total 12 layers).
Turn off heat. Leave in steamer for 3 minutes to get "oily" texture.