Heat the oven to 180°C / gas 4 conditions and apply butter in 12-16 silicone donut moulds.
Beat sugar and butter in a large bowl using an electric beater. Then beat in the eggs and mix well with plain flour, salt, cocoa powder, baking powder, vanilla and milk .
Add the mixture into moulds bake them for 10-13 minutes. They will start to come away from the mould edges.
After removing from oven turn the moulds upside down an place on a cooling rack. After 2-3 minutes remove the moulds carefully and keep for cooling completely.
Melt the dark chocolate in a heatproof bowl over a pan of simmering water, making sure the bowl doesn’t touch the water.
Then dip the top area of the donuts into melted chocolate and place them on a trey with the chocolate coated side up.
Using the same process melt the white chocolates and using a stick draw concentric white chocolate circles from in to out.
Without letting the white chocolate to dry, drag the inner circle out to make the points of the spider's web. remember to set the the chocolate fully before serving