Liquefy the butter and leave to cool slightly. Add 20 drops each of myAROMA vanilla and marzipan flavour. Add the icing sugar, flour, cornstarch and a pinch of salt. Mix with a hand mixer until a dough forms. Wrap in cling film and chill in the fridge for 30 minutes. Divide the dough into two pieces on a floured work surface and form both into a roll. Cut slices to about 2 centimetres thick. Place on a baking tray with baking paper and bake at 150°C for about 12 minutes. Leave to cool and sprinkle with icing sugar. To serve, place a small teaspoon of orange marmalade on each cookie.