Preheat the oven to 180C Gas Mark 4
Line a small baking tin with baking parchment
Cream together the butter and sugar until fluffy
Mix in the eggs one at a time and the vanilla essence
Stir in the flour, baking powder and salt
Add the nuts, chocolate and coconut to the mixture
Pour into the baking tin
Bake in the oven for half an hour or until firm but still squishy