Preheat the oven to 190°C. Grese and line the base of a cake tin.
In a large bowl, combine the eggs, oil, chestnut purée and milk. Mix well until smooth, then add the sugar. Mix again.
Add gradually the flour and the baking powder.
When you have a smooth batter, pour it into the cake tin.
Bake the cake in the middle of the oven for 30 minutes or until an inserted skewer comes out dry.
Let the cake cool in the tin for 5 minutes, then transfer it from the tin to a wire rack.
Dust with some icing sugar, or make some chestnut cream/icing and spread on the top.