1Stir together slightly crushed cornflakes and peanuts in a large bowl. Set aside.
In a saucepan combine corn syrup, and sugars. Bring to a boil and boil fully for 1 minute. Remove from heat and stir in peanut butter. Pour over cornflake mixture and mix gently until everything is coated.
2Press mixture into a buttered 15 by 10 inch pan. Cool and cut into 24 bars.