Ginger and treacle spiced traybake Make this ginger cake traybake in advance and you can freeze it before adding the icing - in fact freezing improves the taste. Ingredients 225g/8oz margarine, softened 175g/6oz light muscovado sugar 200g/7oz black treacle 300g/10oz self-raising flour 2 tsp baking powder 1 tsp ground mixed spice 1 tsp ground allspice 4 free-range eggs 4 tbsp milk 3 pieces stem ginger from a jar, finely chopped For the icing 75g/2½oz icing sugar, sieved 3 tbsp stem ginger syrup from the jar 3 pieces stem ginger from a jar, chopped coarsely How-to-videos Method 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. Preheat the oven to 160C/325F/Gas 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 t