This recipe is really awesome because I completely made it up 100% and it came out SOOOO good. I fed it to my flatmates and took it to work and fed it to my workmates and they all absolutely loved it! When I told them that not only were they homemade but that the recipe was made up by me, they were shocked and said that they were delicious.
The recipe for white chocolate and berries brownie is almost identical. Just replace the 200g of dark chocolate with white chocolate instead at the beginnin, then after mixing in the egg, simply mix in 1/2 a cup of white chocolate chunks, the cornflakes and either 1/4 - 1/2 a cup of diced strawberries, raspberries, or 1/4 of a cup of both of them!