Whoopie pies

Preheat oven to 160°C. Line 2 oven trays with baking paper. Put 200g of the butter and sugars in the bowl of an electric mixer and beat with paddle attachment on medium for 5 minutes or until light and creamy. Add eggs and egg yolks, then beat until combined.

Sift flour, cocoa, baking powder and ginger over butter mixture, then fold until a stiff dough forms. Divide dough into 24 pieces and use your hands to roll each into a ball. Arrange balls 7cm apart on prepared trays and bake for 20 minutes or until firm. Cool on trays for 5 minutes, then transfer to a wire rack to cool completely.

Put marshmallows and remaining butter in a small saucepan over a low heat and cook, stirring until melted.

Remove pan from heat, add chocolate and beat until smooth. Set aside for 5 minutes or until cool.

Spread 1 heaped tablespoonful of the marshmallow mixture onto flat side of 1 biscuit, then sandwich with a second biscuit. Repeat with remaining marshmallow mixture and biscuits.

Spread hundreds and thousands on a plate, then roll edges of each pie to coat. Serve.