Oil bread tins (1 large or 4 mini loaves or 12 muffin tins). In a large bowl cream together 1⁄2 cup butter and 3⁄4 cup sugar. Add the egg, beating well. In a separate bowl combine 2 cups flour, baking powder and salt. Add to the creamed mixture alternately with the milk. Fold in the blueberries. Fill the prepared pans ’s full.