Whoopie Pies

1 1/2 cups (150g) plain flour
1/2 tsp baking powder
1 1/2 tsp bicarbonate soda
120g unsalted butter, softened
1/2 firmly packed cup (100g) brown sugar
1 egg, at room temperature
1 tsp vanilla extract
1/2 cup (125ml) milk
Juice and zest of one lemon

Filling

1/2 cup of lemon curd
1/2 cup of mascarpone

Mix together.

Preheat the oven to 180°C. Line 2-3 baking trays with baking paper.
Sift the flour, baking powder and bicarbonate of soda into a bowl.
Beat the butter and sugar in an electric mixer on high speed until light and fluffy. Beat in the egg, followed by the vanilla, lemon and milk. Reduce speed to low, add dry ingredients and beat until combined. Place 32 tablespoonfuls of mixture 4cm apart on the prepared trays. Bake for 7-8 minutes until doubled in size and firm on top when gently pressed. Cool on trays

Once completely cool, sandwich together with filling.