Caraway biscuits stacks with lemon filling

200g of butter

190g of caster sugar

1 egg, lightly beaten

2 tbsp of lemon juice

1 tsp of vanilla essence

500g of plain flour

½ tsp of caraway seeds

1 tsp of baking powder, sieved

For the filling:

3 tbsp of cream cheese

2 tbsp of lemon curd

1 ½ tbsp of icing sugar