Preheat oven to 150°c

chop up butter into small pieces and put to one side

grease a cake or flan tin, 8 inch is best

put all dry ingredients into large bowl together

add the butter pieces and rub together with your fingers to form a soft sticky dough. do not over work the dough or it will become tough

spread the dough out into the cake/flan tin, don't worry if it doesn't spread out to the edges as this will fill out in the oven

leave for ten minutes then check every five minutes thereafter as this bakes very quick! it will go a slight brown colour and should still be slightly soft but will harden as it sits.

when fresh from the oven sprinkle caster sugar over and use a knife to make guide lines of where the pieces can be cut.

pop into fridge to cool then enjoy!!!