Don’t be too worried if the traybake dips in the centre – it means you were a little generous with the treacle.
MAKES 15–20 SLICES
AGA - Hang on the lowest set of runners of the Roasting Oven with the cold plain shelf on the second set of runners and cook for 20–25 minutes until deep brown and set round the edges. Transfer the hot plain shelf to the centre of the Simmering Oven and slide the roasting tin on top of it. Allow to cook for 15–20 minutes until ready.
PREPARING AHEAD - Make up to 2 days ahead, and ice on the day. If you want to freeze, leave whole, un-iced, wrap in foil and freeze for up to 2 months. Thaw for about 6 hours at room temperature, then ice and cut into 15–20 squares.
TIP - A great standby for Christmas: it’s good to give to carol singers with mulled wine.
This recipe is taken from: Mary Berry's Family Sunday Lunches