Step 1

Add the butter, sugar and vanilla extract to the Thermomix bowl and beat for 20 sec/speed Scrape down the bowl, then repeat for 20 sec/speed 3.

Step 2

Add the egg and mix for 10 sec/speed Scrape down the Thermomix bowl with a spatula and mix again for 10 sec/speed (the mixture may split, but that's okay).

Step 3

Add the flour and salt and mix for 10 sec/speed Scrape down the Thermomix bowl with a spatula and then knead for 1 minute (dough setting).

Step 4

Tip the dough onto a lightly floured board and knead it into a ball shape (be careful not to over-knead). Divide the dough into two portions, cover each with cling film, and then chill in the fridge for 20-30 minutes.

Step 5

Preheat the oven to 180ºC (160ºC fan). Line 2 baking trays with baking paper.

Step 6

Remove the dough from the fridge. Roll one out to 3-4mm thick. Using a 6cm round cookie cutter, cut rounds from the dough, re-rolling any scraps. Place 3-4cm apart on the trays. Bake in the oven for 8-10 minutes. The edges should be slightly hard but soft in the middle.

Step 7

Allow to cool on the trays for 10 minutes before transferring them to a wire rack to cool completely. Repeat with the remaining dough portion.