Place 225 grams butter, 90 grams icing sugar, 80 grams cornflour, ½ tsp vanilla extract and 250 grams plain flour into the bowl of a food processor and blend until they come together to form a soft dough.
Roll the dough into teapsoonful size balls and place on a lined baking tray.
Bake in the centre of your preheated oven for 10-12 minutes, until slightly golden around the edges.
Transfer to a wire rack to cool completely.
To decorate, mix 150 grams icing sugar with 4-5 tsp cold water to make a slightly runny frosting. Place a small dollop of the frosting on the top of each whipped shortbread and decorate with glace cherries.