Pre-heat oven to 200°C. Line a large baking tray with baking paper.
Place FATE, custard powder, sugar, margarine, and chocolate melts into a bowl. Using a large metal spoon, mix, combining ingredients, a breadcrumb mixture will form.
Using your hands, combine mixture to form a dough. Break off ¼ cup amounts, and using your palms, roll each to form a small ball. Place ball on prepared oven tray.
Repeat latter part of step 3., until you have 15 small balls of dough on the tray, placed evenly apart. Flatten each ball with the back of a fork, to approx. 1cm thickness.
Bake 15-20min., until golden. Remove from oven and leave to cool on the tray for 5min. Using a spatula, carefully lift each biscuit onto a wire rack to cool further. The cookies will appear slightly crumbly, but with cooling will firm.