Scottish Shortbread - cooking recipe

Ingredients

1 lb. butter (do not use margarine)
6 c. flour
1 tsp. baking powder
1 c. sugar plus 1/2 c. more to sprinkle on top
2 Tbsp. cornstarch

Preparation

Work all together until it forms a stiff paste.
Press into a shallow baking pan about 1/2 inch thick and prick all over with a fork.
Sprinkle lightly with sugar.
Bake at 375\u00b0 for 5 minutes, then reduce heat to 300\u00b0 and continue to bake until golden but not brown (about 20 minutes).
Serve with anything.