It does not say how to prepare the tin, but I think you would need to line it with foil or baking paper.
Ingredients:5 cups icing sugar mixture(500g)
2-2/3 cups desicated coconut (250g)
2 egg whites
1 teasp vanilla
125 g copha
pink food colouring.
Method:sift icing sugar into bowl, add coconut, mix well.
Make a well in the centure, add lightly beaten egg whits and vanilla,
Melt copha and add to coconut mixture. Mix well.
divinde in half, colour one half pink.
In a 20cm square cake tin, press the white half into the tin, then the pink on top.
When set, cut into squares.