I have Mary Berry to thank for the original recipe - thank you Mary
No apologies for my use of imperial measurements here - I'm a child of the 70's and a fan of American cooking so I will happily switch between ounces, grams & cups.
I've specified cornflour here. This makes a very soft, melt in the mouth ( or melt in your tea if you're a dunker like me ) biscuit. If you like something a bit crunchier use ground rice, semolina or polenta.
You can add different flavours to vary your shortbread; powdered & crystallised ginger, chocolate chips, lavender flowers etc etc
8oz plain flour
8oz butter ( soft room temperature )
4oz caster sugar
Preheat oven to 140 degrees C ( this is for a fan oven, a conventional oven will need to be about 160 )
Line a 12x9 inch roasting tin ( if you own an AGA this is the small pan ) with foil or silicon lining.
Beat all the ingredients together to form a dough, then press into the pan and spread out so the top is even. Prick all over with a fork, then put into the oven.
Bake for about 40 minutes or until the top is slightly golden.
Take out of the oven and leave in the tin till they are completely cool. If you take out too soon they may be too crumbly. Then take out of the pan and cut into fingers ( as thick or as thin as you like ).
Keeps for a few days in an airtight tin ( assuming you don't live with my husband or have lots of B&B guests )