Preheat oven to 450°.
Combine first 5 ingredients in a large bowl; cut in margarine with a pastry blender until mixture resembles coarse meal. Add milk and cheese, stirring just until dry ingredients are moistened.
Sprinkle 1 1/2 teaspoons flour over work surface. Turn dough out onto floured surface, and knead 10 to 12 times. Roll dough to 1/2-inch thickness; cut into rounds using a 2-inch biscuit cutter.
Place rounds on an ungreased baking sheet. Bake at 450° for 8 to 10 minutes or until biscuits are golden. Serve warm.
Tip: For baking success, use this method to correctly measure flour: Fluff the flour with a fork, lightly spoon it into a dry measuring cup, and level with a straight edge.