Meanwhile, lightly spoon flour into measuring cup; level off. In large bowl, combine flour, 2 tablespoons sugar, baking powder and salt; mix well. With pastry blender or fork, cut in 1/4 cup margarine until crumbly. In small bowl, combine egg and 2 tablespoons milk; beat well. Stir into flour mixture until a stiff dough forms, adding additional milk, 1 teaspoon at a time, if necessary.