HEAT oven to 350 degrees F. Combine brownie mix with nuts, butter and egg in large bowl; stir with spoon until well blended. Add cereal, chocolate chips and oats; mix well. Drop dough by rounded teaspoonfuls 2 inches apart onto ungreased cookie sheets.
BAKE 9 to 12 minutes or until edges are set (centers will be soft). Cool 1 minute; remove from cookie sheets. Cool 10 minutes or until completely cooled. Store in tightly covered container.
High Altitude (above 3500 ft.):
ADD 2 tablespoons flour to dry brownie mix. Bake as directed above.