Butter 9"x9"x2" pan. In large pan ... boiling. Stir in peanut butter, remove from heat and add vanilla. Pour over Cheerios and chocolate chips. Refrigerate 1 hour.
In large bowl, combine cereals, peanuts, and pretzels. In medium ... brown sugar, and butter in saucepan, and bring to ... temperature. Cut into bars when completely cooled.