Neenish Tarts

125g butter
125g sugar
1 egg
225g flour
1 tsp baking powder
⅛ tsp salt
Cream butter and sugar, add egg and beat well. Mix in sifted dry ingredients and knead well. Roll out and line patty tins, prick and bake for 7-10 minutes @ 180C. Allow to cool before filling.
Filling
50g butter
4 T icing sugar
4 T sweetened condensed milk (80g)
2 dessertspoons lemon juice
Soften butter, add remaining ingredients. Fill cases. Allow to set before icing with thin white icing and a swirl of chocolate icing.