Step 1

Pre-heat your oven to 180°c (160°c for a fan-assisted oven or Gas Mark and line a 11x7 inches tray bake tin with tin foil and grease generously with butter. Set aside.

Step 2

In a large pan, warm the butter, golden syrup and sugar - stirring regularly - until melted together. This can be done in the microwave, just use a microwave-proof dish and remove to stir frequently.

Step 3

In a large bowl, lightly mix the oats and cinnamon before adding the melted mixture and stirring until all the oats are covered.

Step 4

Transfer the mixture to your pre-lined/greased tray and smooth the mixture into the corners.

Step 5

Bake in your pre-heated oven for about 20 minutes, until the edges are lightly golden and the middle still has a "slight wobble". The edges will have risen a little, so press back down with a cold spoon if desired.

Step 6

Leave to cool a little in the tray before removing, carefully peeling off the tin foil and cutting into your desired sized slices.