Family Circle Best Ever Chocolate Cake

125g (4oz) butter
1/2 cup (125g) caster sugar
1/3 cup (40g) icing sugar sifted
2 eggs
1 teaspoon vanilla essence
1/4 cup (80g) blackberry jam
1 1/4 cups (155g) self raising flour
1/2 cup (60g) cocoa powder
1 teaspoon bicarb soda
1 cup milk

1. preheat oven 180 degrees (moderate) grease 20cm 8 inch square cake tin with baking paper
2. Beat butter caster sugar and icing sugar with an electric mixer in a small bowl until mixture is light and creamy. Add eggs gradually beat thotoughly between each addition. Add vanilla and jam and beat until combined.
3. Transfer mixture to a large mixing bowl. Using a metal spoon fold in the combined sifted flour, cocoa and bicarb alternately with the milk. Stir until the mixture is just combined and almost smooth.
4. Pour into the tin and smooth the surface. Bake 45minutes. Leave cake in tin for 15 minutes before turning out on a wire rack.

hope this helps