In most of the world, flapjacks are soft oat biscuits (or cookies). Except in South Africa, where they look like Scotch Pancakes and are sometimes described as 'crumpets'. This recipe is for British flapjacks. It's very easy, and the flapjacks are utterly delicious.
Pre-heat your oven to 160°C (320°F).
Melt the butter into the sugar over a low heat. Transfer to a bowl, stir in the oats and the golden syrup. Line a rimmed baking sheet with a silicon mat or greaseproof paper, and spread the mixture out flat. Use something like a potato masher to create an even layer about 6mm (quarter of an inch) thick.
Bake for 35-40 minutes. Allow to cool for about 15 minutes, then cut into squares, rectangles or triangles.