First, grab a big saucepan. Add the butter, chocolate pieces, and golden syrup to it.
Place the pan over low heat. Stir slowly and keep it gentle until everything melts together. You want a smooth, shiny chocolate sauce.
Once melted, turn off the heat. Now, toss in the cornflakes.
Use a spoon to gently stir until all the cornflakes are covered in chocolate. Make sure every piece gets a good coating.
Line a muffin tin with paper liners. If you don’t have any, just place a sheet of parchment paper on a tray.
Spoon the mixture into the liners or drop it in little mounds onto the parchment paper.
Put the tray in the fridge and let them chill for at least one hour. They should feel firm to the touch.
Once set, take them out and enjoy the crunch!