Line your baking tray with parchment paper. Make sure the paper covers all sides. This helps remove the flapjacks easily later. Preheat your oven to 180°C (350°F). A ready oven ensures even baking and perfect texture.

Take a saucepan and add butter, brown sugar and golden syrup. Heat on low flame. Stir slowly until everything melts into a smooth mixture. Do not boil it. Just let it combine gently.

Once melted, remove from heat. Add vanilla extract and a pinch of salt. Stir well to mix flavors evenly. This step gives a lovely aroma and balances sweetness perfectly.

Add rolled oats into the warm mixture. Stir slowly until all oats are fully coated. Make sure no dry oats remain. The mixture should look thick and sticky.

Pour the oat mixture into your lined tray. Spread it evenly using a spatula. Press it down gently so it holds shape after baking. Smooth the top for even cooking.

Place the tray in the oven. Bake for about 20 minutes. The top should turn golden brown. Do not overbake or they will become hard instead of chewy.

Remove from oven and let it cool in the tray. This step is very important. Once slightly warm, cut into squares. Let them cool completely before removing.