shortbread cookie dough for cut out cookies

this is the cookie recipe i use to make my cut out cookies. i tend to roll the dough to about 3 millimetres thick to make them easier to handle, before and after baking. they are easily decorated either before or after baking as well.

1 cup butter
3/4 cup sugar
2 cups plain flour
1/2 cup custard powder

cream butter & add sugar gradually.
combine the flour and custard powder.
add the flour and custard powder to the butter mixture and mix well.
divide dough into several portions.
flatten one portion at a time on lightly floured surface with hands.
roll out smooth with lightly floured rolling pin.
cut into desired shapes & place on baking sheets lined with baking paper.
bake at 170°C for 10-15 minutes until golden brown around edges.