In the bowl of a stand mixer fitted with a paddle attachment, cream together the butter and sugar until light and fluffy.
Add the flour, cornstarch and salt then mix until just combined.
Scoop a bit of cookie dough and form into a 2cm/1-inch balls.
Place on baking sheets lined with parchment paper. With a back of a rounded measuring spoon or using your thumb, press an indent into the cookies. Fill each hole with preserves.
Place in the fridge for at least 30 minutes to chill.
Preheat the oven to 180°C/350°F.
Place the cookie sheets in the oven and bake for 15 minutes until golden brown.
Remove from the oven and allow to cool for 10 minutes then transfer to a wire rack and allow to cool completely.
Video
Notes
Food Processor Directions:
Add the dry ingredients in a food processor and pulse until mixed.
Add the room temperature butter to the flour mixture then pulse until a soft dough forms. Proceed with the recipe as above.