01 -
Preheat the oven to 160°C fan bake.
02 -
Cut the butter into cubes and add to the bowl of a mixer. Add the icing sugar and vanilla, then beat for a few minutes until pale and fluffy.
03 -
Sift in the cornflour and plain flour. Mix on low until it forms a fine crumb. Press the dough into a ball and knead a few times on a floured bench.
04 -
Roll the dough out to a 1cm thickness. Use a round or square cookie cutter to cut into shapes.
05 -
Carefully transfer the cookies to a lined baking tray and bake for 12 minutes until they start to brown on the edges but are still soft.
06 -
Remove from the oven and leave to cool on the trays.
07 -
Add the butter and milk to a large glass bowl, microwave until the butter has melted, then whisk together. Sift in the icing sugar and whisk until smooth. Add extra milk if needed to make a smooth icing.
08 -
Spoon a teaspoon of icing onto each cooled cookie, spreading it to the edges. Dip each one in the sprinkles until they are all coated.
09 -
Once the icing is set, serve or store in an airtight container for up to 5 days.