Susan's Mum's Sour Cream Coffee Cake

1 T instant coffee
1 T hot water
1 cp brown sugar
150 g sour cream
1/2 cp soft margarine
2 eggs
1 1/2 cp flour
3 tsp baking powder

Preheat oven to 160C (325F).

Grease and line 2 20cm (8") sponge sandwich tins (round cake pans).

Dissolve coffee in hot water in mixing bowl. Cool. Add sugar, sour cream, margarine and eggs then sifted flour and baking powder. Beat till smooth. Spread mixture into tins.

Bake for 25 - 30 min. 

Sandwich with filling and ice.

Filling

4 oz unsalted butter
8 oz icing sugar (powdered sugar)
1 T hot water
1 tsp instant coffee

Sift icing sugar into mixing bowl. Add butter and beat till smooth. Mix coffee in water, add to sugar mixture and beat till well mixed. You can increase coffee if flavour is not strong enough.