Heat oven to 350°F. Grease 13x9-inch pan. In large bowl, combine brown sugar, peanut butter, corn syrup, margarine and vanilla; blend well. Add all remaining ingredients; mix well. Press evenly in greased pan.
Bake at 350°F. for 15 to 20 minutes or until light golden brown. Cool 1 hour or until completely cooled. Cut into bars.