We had some bananas that had gone rather ripe for enjoyable eating. This recipe is a great way to use them up. The nuts give it crunch, while the sour cream makes it super moist.
See the link for full details, but here is a quick summary.
Melt 1/2 cup of butter, and mix in 1 cup of sugar then 2 eggs and a tsp of vanilla extract. Combine 1 1/2 cups of flour, 1 tsp baking soda, and 1/2 tsp salt then stir the dry ingredients into the butter mixture. Finally fold in 1/2 cup each of sour cream and chopped walnuts, and 2 mashed bananas. You should end up with a creamy batter. Pour into a baking tin and bake on 350F for about an hour.
Try to at least let it cool a bit before you scarf it all down.