Banana and Walnut Buns

I made these up today. The result was pretty tasty.
Fills 20 small bun cases.
- 4oz butter
- 4oz caster sugar
- 2oz soft brown sugar
- 8oz self raising flour
- 1 tsp baking powder
- 1 tsp heaped cinammon powder
- 3 overripe bananas (fairtrade if possible)
- 50g chopped walnuts
Using a food processor if possible, cream together the butter and the sugar till soft. Beat in the eggs. Transfer into a large mixing bowl. Whizz up bananas in food processor till runny, then beat into mixture and add walnuts. Mix flour, cinnamon and baking powder and sieve into mix, slowly folding in. Pour into cake cases, and transfer to oven. Bake for about 15mins. Sprinkle with icing sugar and cinnamon and see whether you can wait till they're cool before you eat them all.