1 lb. butter
3/4 lb. white flour (sifted = 3 c.)
1/2 lb. rice flour (1 2/3 c.)
1/2 lb. sugar (1 1/8 c.)

Mix butter and sugar together with fingers. Gradually add flour until mix "leaves" your hands. Shape into small rectangles, prick with a fork. Bake in a slow oven until very light brown, 325 degrees. This is from a friend's Scottish grandmother, terribly authentic and they melt in your mouth.