Coffee and Walnut cake

Knowing I was going to visit two friends on Thursday I wanted to make a delicious cake to take with me. I flicked through several of my bakery books and found this, a delicious coffee and walnut cake. It is such a simple recipe and the combination is classic and sublime.

225g soft butter
225g light soft brown sugar (I did not have any so used golden caster sugar which worked equally well)
4 eggs
3 tea spoons instant coffee powder
2 tea spoons boiling water
225g self raising flour
1.5 tea spoons baking powder
65g walnut chopped
1 tablespoon milk
8-10 walnuts to decorate

For the filling and topping
175g very soft butter
400g icing sugar
2 tea spoons instant coffee  dissolved in 2 tea spoons of boiling water
1 table spoon milk

Pre heat your oven to 180c
Put the butter and sugar in a bowl and mix until light and fluffy
Add the eggs, one by one, mixing after each addition
Put the coffee and boiling water in a small jug and stir until all the granules have dissolved
Sift the flour and baking powder into the butter, sugar and egg mix and stir. Add the walnut and coffee mix and stir until all is combined.
Divide the mixture between two baking tins, I use round 8 inch tins.
Bake for 22-25 minutes until golden
Allow to cool

To make the filling put butter and icing sugar in a bowl and mix until combined. Add the coffee mix and milk and mix until light and fluffy

Fill your cooled cake with the half the filling, sandwich together and spread the rest on the top of your cake. decorate with the walnuts however you wish