Add golden syrup, cocoa powder, butter and sugar into a pot and heat on the stove until it's fully melted and bubbling slowly (be careful not to boil it)
Add this liquid mixture to cornflakes and stir everything with a spoon until fully coated
Grease a square baking tin then line with greaseproof paper (I like cutting a long rectangle so you have two 'wings' to help lift the cake out once set)
Using a spatula or spoon, lightly press down and smooth out the top of the cake
Place in the fridge to set for approx. 3 hours
Use a sharp knife to cut yourself a slice and enjoy!
