In a medium mixing bowl, stir together the flours, rosemary, sugar, baking powder, baking soda, and salt. Using a pastry blender, cut in butter until mixture resembles coarse crumbs. Make a well in the center of the flour mixture. Add the milk all at once. Using a fork, stir the mixture until just moistened.
Turn the dough out onto a lightly floured surface. Quickly knead the dough by gently folding and pressing 10 to 12 strokes or until nearly smooth. Pat or lightly roll dough into an 8-inch square. Cut the dough into 12 biscuits.
Place biscuits close together on a lightly greased baking sheet. Bake in a 400 degree F oven for 16 to 18 minutes or until golden. Remove biscuits from baking sheet and serve hot. Or transfer biscuits to a wire rack; cool. Makes 12 biscuits.