Date and Walnut Cake 110g chopped dates, 55g marg, 225ml boiling water, 1 tsp bicarb, 225g self raising flour, 55g chopped walnuts, 85g brown sugar, 85g caster sugar, 1 large egg. Put dates and marg in basin with boiling water and bicarb. Mix to melt marg and leave to cool. Combine flour, walnuts, and sugar, then add to cooled date mixture with egg. Add to lined loaf tin. Cook 60 mins at 160 fan.