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Preheat the oven to 170c/150c fan oven.
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Beat the butter and sugar together, then add the egg, vanilla extract, almond extract and food colour and beat again.
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Sift together the flour and baking powder. With the mixer on low, gradually add the flour mix to the butter mix. It should start to come together.
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Turn the dough out onto a floured surface and work the dough until it comes together.
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Re-flour your work surface and roll out your dough to about 1/2 a cm thick and using a cookie cutter, cut out your biscuits. Keep going until you have used up your dough and then put your biscuits onto a baking tray covered in baking paper.
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Bake in the oven for 10 minutes and then leave to cool.
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While your cookies are cooling you can make the buttercream. Pour the prosecco into a small pan and simmer until it has reduced down to about a quarter of a cup.
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In your mixer beat the butter until it is pale and fluffy and then gradually add in the icing sugar.
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Keep beating it and pour in the reduced prosecco.
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To assemble your cookies put your buttercream into a piping bag fitted with a nozzle of your own choice. You can create different looks with different nozzles, I used a small round.
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Pipe the buttercream onto the underside of one cookie and then place another cookie on top to form a sandwich, keep going until they are all done. Eat and enjoy!