About this recipe:Ever heard of a whoopie pie? They're a bit like a macaroon but with a more cake-like texture. Hugely popular Stateside, the name comes from when Amish women would put them in farmers' lunchboxes and they'd supposedly shout 'whoopie' if they found one in their box!
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Method Prep:10min › Cook:10min › Ready in:20min
Preheat oven to 180 C / Gas 4. Line baking tray with parchment or greaseproof paper.
In a large bowl (or electric mixer) cream together butter, sugar and finally the egg. In another bowl, combine cocoa, flour, bicarb and salt.
Add the dry ingredients to the mixture, add the milk, vanilla and soured cream mixture; beat until smooth.
Put equal amounts of batter (125ml) onto the lined baking tray. Six per tray as they will spread when baking.
Bake 10 minutes or until when pressed the sponge keeps its shape. Remove from oven and let cool completely on a wire rack.
Make filling. Add to piping bag with star shaped nozzle.
For finishing touches, sieve 150g (5oz) icing sugar into a medium bowl and gradually add enough water to make a smooth, spreadable icing. A few drops of food colouring will give you a colourful finish. Sprinkle with your favourite sprinkles.