In small bowl, stir together flour, baking powder and salt. Set aside.
In large electric mixer bowl, beat the 1 cup margarine(or use a combo of butter and shortening) and sugar until light and fluffy. Add eggs and 1/2 cup orange juice. Beat well. Add flour mixture. Mix until well combined. Stir in cereal. Drop by level tablespoon onto ungreased baking sheets.
Bake at 350 degrees F for 12 minutes or until lightly browned. Remove immediately from baking sheets. Cool on wire racks.
When completely cooled, frost with Orange Icing. Decorate with additional cereal, whole or crushed.
Orange Icing: Measure confectioners' sugar, margarine and orange juice in small mixing bowl. Beat until smooth.