Step 2

Melt the butter, dark brown sugar, golden syrup and orange zest together in a large saucepan over medium heat, stirring until smooth. Avoid boiling to preserve volume.

Step 3

Add the oats and stir well until evenly coated. Stir through the Christmas pudding chunks and tip into the prepared pan. Flatten the top with the back of a spoon.

Step 4

Bake for 40 minutes until the edges start to brown.

Step 5

Score into 12 squares while it is still warm in the pan, then allow it to cool completely, about 1 hour, before cutting along the scores.