- Preheat the oven to 300°F (150°C).
- In a small saucepan, melt the golden syrup with the sugar and butter.
- In a large bowl, mix the remaining ingredients together.
- Then, pour in the warm mixture and stir to combine.
- Pack the mixture into the baking tin, pressing the mixture flat with the back of a spoon.
- Bake in the oven for 30-40 minutes, until golden brown.
- Cut the flapjack into squares.
- 125g butter
- 3 tablespoons golden syrup
- 125g brown sugar
- 250 porridge oats