1. Set oven at 450F. Arrange shelf in oven in the top third of the oven.
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2. Sift the flour, salt, and sugar into a bowl, rub in the butter, add milk to make a soft dough. Knead lightly on floured surface, then pat into a rectangle about 3/4" thick. Cut into squares or rounds.
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Arrange on a lightly greased tray. Brush with milk to glaze.Bake for 12 - 15 minutes, or until well risen and golden brown.