Simple British Flapjack

Ingredients:
- 1/2 cup butter
- 3 tablespoons white sugar
- 2 tablespoons golden syrup
- 2 cups rolled oats
- 5 tablespoons raisins (optional)
- 1 (5 ounce) milk chocolate, melted (optional)

Directions:
- Preheat the oven to 350 degrees F (175 degrees C). Lightly butter a baking pan.
- Combine butter, sugar, and golden syrup in a saucepan over low heat. Mix until butter has melted and sugar has dissolved. Remove from heat. Add 2 cups oats and raisins. Mix until oats are well coated. Pour mixture into the prepared pan; flatten down with the back of a spoon.
- Bake in the preheated oven until golden brown on top, 10 to 20 minutes. Let flapjack cool.
- Melt chocolate in a microwave-safe glass or ceramic bowl in 15-second intervals, stirring after each interval, 1 to 3 minutes. Pour over the cooled flapjack. Let cool until chocolate is set.