Stir together flour, salt and pepper. Set aside. In large mixing bowl, beat margarine and cheese until very light and fluffy. Stir in cereal.
Add flour mixture, mixing until well combined. Drop by rounded measuring-teaspoon onto ungreased baking sheets. Flatten with fork dipped in flour.
Bake at 350, 12 minutes or until lightly browned around edges. Remove immediately from baking sheets. Cool on wire racks. Makes about 5 dozen.