Creating your flapjack is straightforward. Just follow these simple steps:

1. Preheat Oven: Set your oven to 180°C (350°F) and line a baking dish (approximately 20cm x 20cm) with baking parchment for easy removal.

2. Melt Ingredients: In a saucepan over low heat, combine the unsalted butter, brown sugar, and golden syrup. Stir until fully melted and combined.

3. Combine Oats: Remove the saucepan from the heat. Stir in the rolled oats, vanilla extract, and a pinch of salt until everything is well mixed. If adding chocolate chips or nuts, fold them in now.

4. Pour Mixture: Transfer the mixture to the prepared baking dish. Spread it evenly and press it down firmly with the back of a spatula.

5. Bake: Place the dish in the preheated oven and bake for 25-30 minutes or until the top is golden brown. Keep an eye on them as they can burn easily!

6. Cool: Once baked, remove the dish from the oven and let it cool in the tin for about 10-15 minutes. After that, lift the block out using the parchment paper and allow it to cool on a wire rack before cutting into bars.

7. Cut and Serve: Finally, cut your flapjack into squares or rectangles and enjoy!