Blend butter, flour, sugar and cornflour, shape into rounds, and bake until pale gold.

Steps

1. Blend all ingredients together.
2. Crimp into two 8 inch rounds.
3. Crimp the edge with a fork.
4. Bake for 50–60 mins. at 275°F.
5. Sprinkle with castor sugar; cut in wedges while still warm.