Step 1

Cut a rectangle of non stick baking parchment to fit the base and sides of a 30x23x4cm/12x9x1½in traybake tin or roasting tin. Grease the tin and then line with the paper, pushing it neatly into the corners of the tin.

Step 2

Preheat the oven to 160C/325F/Gas 3.

Step 3

Measure all the ingredients for the traybake into a large bowl and beat well for about two minutes until well blended. A hand-held electric mixer is best for this but of course you can also mix it by hand with a wooden spoon. (Treacle can be difficult to weigh accurately as it tends to stick to the scale pan. Weighing the treacle on top of the sugar overcomes this problem.)

Step 4

Turn the mixture into the prepared tin, scraping the sides of the bowl with a plastic spatula to remove all the mixture. Level the top gently with the back of the spatula.

Step 5

Bake in the preheated oven for about 35-40 minutes, or until the traybake springs back when pressed lightly with a finger in the centre and is beginning to shrink away from the sides of the tin. Allow the traybake to cool a little, then remove the cake from the tin by easing the paper away from the sides of the tin. Turn onto a cooling rack, remove the lining paper and leave to cool completely.

Step 6

To make the icing, mix the icing sugar and syrup together in a small bowl until smooth and a spreading consistency. Pour the icing over the cake, spread gently to the edges with a small palette knife and sprinkle with the chopped stem ginger to decorate.

Step 7

Allow the icing to set before slicing the traybake to serve.