2-3 tbsp golden syrup (depending on how gooey you want it)
Heat oven to 200C/180C fan/gas 6. Put all the ingredients in a food processor and pulse until mixed, but be careful not to overmix otherwise the oats may lose their texture.
Lightly grease a 20x20cm baking tin with butter and spoon in the mixture. Press into the corners with the back of a spoon so the mixture is flat and score into 12 squares. Bake for around 15 minutes until golden brown.