Aussie Melting Moments - cooking recipe

Ingredients

250 g butter (at room temperature)
80 g powdered sugar icing (a confectioner's sugar/cornflour blend sold here in Oz; substitute icing sugar)
1 teaspoon vanilla essence
265 g plain flour (1 3/4 cup)
50 g cornflour (cornstarch, (1/3 cup)
icing sugar, for dusting
FILLING
60 g butter (at room temperature)
80 g icing sugar (1/2 cup)
1 tablespoon cocoa

Preparation

Preheat oven to 160 deg Celsius Line 2 baking trays with baking paper.
Beat butter, icing sugar/mixture and vanilla essence with an electric mixer until pale and creamy.
Sift together flour and cornflour, and add to the butter mixture.
Mix together gently with a wooden spoon, and then with your hands.
Use lightly floured hands to roll mix into walnut-sized balls.
Put on trays about 5cm apart, and flatten with a lightly floured fork to about 1cm thick.
Bake for about 15 minutes, swapping trays in oven halfway through (ie. at 7 minutes), until cooked through.
Cool on baking trays.
Filling: Use an electric mixer to beat butter, icing sugar/mixture and cocoa together until well-combined.
Sandwich cooled biscuits together with the filling then lightly dust with icing sugar.
Vary the filling flavour by substituting the cocoa with one of the following:
grated rind of 1 orange.
grated rind of 1 lemon.
1 tbsp of passionfruit pulp.