Servings: 7 dozen crackers Sift together flour, baking powder, mustard and pepper. Cream margarine, gradually blend in cheese and nuts. Add flour mixture slowly until blended. Divide dough in half, make rolls 4 cm in diameter, wrap in foil, chill. Slice each roll into very thin slices. Arrange on greased cookie sheets. Bake at 400 deg F for 6 minutes. Cool immediately on wire racks.