Ingredients

For the biscuits:

185g butter
1/3 cup icing sugar
1 1/2 cups plain flour
1/3 cup custard powder

For the filling:

1/2 cup icing sugar
2 tbs butter
2 tsp custard powder
1/2 tsp vanilla essence

Method for biscuits

Cream butter and icing sugar, add sifted flour and custard powder. Mix well.
Form into balls and place onto greased oven trays and press with a fork to form biscuits. Bake in a moderate oven for about 15 minutes.
Allow to cool completely.

Method for filling

Cream ingredients together.
Spread the filling on the flat side of half the biscuits and sandwich together with remaining biscuits.