Put baking paper in an big oven form approx 30x40 cm, cover the edges as well with paper.
Pour the peanut butter, sugar and the syrup in a casserole. Let it almost boil while stirring at the same time.
Take away the casserole from the stow and add the coconut flakes and the cornflakes in the casserole. Stir it well together.
Spread the mixture evenly in the baking form, and let it cool down for a few minutes.
While the peanut butter cake is resting, it is time to continue with the chocolate.
Cut the chocolate in small pieces and melt it in a casserole together with the rapeseed oil while stirring with a spoon at the same time.
Pour the chocolate evenly on the peanut butter cake.
Let the cake cool down, and then place it cold for minimum one hour before serving.
Cut the cake into squares in the size you prefer.