Beat brown sugar and margarine at medium speed of an electric mixer until fluffy; gradually add egg substitute and vanilla, beating well.
Combine flour, soda, and salt; gradually add to margarine mixture. Stir in oats, white chocolate morsels, and cereal.
Drop dough by rounded tablespoonfuls, 2 inches apart, onto a cookie sheet coated with cooking spray. Bake at 350° for 7 to 8 minutes or until lightly browned. Cool on cookie sheet 5 minutes. Remove to wire racks, and let cool completely.