01 -
In a large mixing bowl, use a stand mixer to beat the butter and confectioners' sugar on medium-high speed for 4–5 minutes until light and fluffy. Incorporate flavouring extracts if using by mixing them in briefly.
02 -
Turn the mixer to low. Gradually add sifted flour and cornstarch, mixing only until no streaks of flour remain and the dough just comes together.
03 -
Divide dough and roll into 36 equal balls. If dough is too soft, cover and refrigerate for 10–15 minutes to firm. Place balls on a parchment-lined baking tray or dusted plate, spacing them apart. Gently press the tops with a fork dipped in flour or cornstarch, then top with sprinkles if desired.
04 -
Transfer dough balls to the refrigerator and chill for at least 2 hours until very firm. Alternatively, freeze to speed up chilling.
05 -
Preheat oven to 150°C (300°F). Arrange up to 12 cookies per tray and bake for 19–20 minutes until set on top. Do not allow them to brown.
06 -
Allow the cookies to cool completely on the baking tray before transferring to a storage container.