I'm posting these recipes today because Laura over at Our Wee Farm has lots of lovely homegrown bananas to use up.
My favourite banana cake recipe is one by Jo Seagar (from her book Jo Seagar's NZ Country Cookbook).
1 cup brown sugar
1 tsp vanilla essence
3 ripe bananas, mashed
1/4 cup milk
2 cups SR flour
1/4 tsp salt
Mix butter and sugar, add vanilla, eggs, bananas and milk. Mix well, add flour and salt. Spoon into well-greased and lined ring tin. Bake 180deg C for about 35 mins. (if using a different shaped tin, i.e. square, the cake might take a bit longer to cook).
If you like, ice with lemon frosting: 2 cups icing sugar, 100g softened butter, grated zest of 2 lemons and a little hot water (about 2-3 Tbsp).
Also there is a fantastic recipe here for banana and coconut cake. Be aware though, it does make a very large cake, so you'll need a big tin. I used my ring tin and a loaf tin, and made 2 (one went in the freezer). I didn't make the frosting as I didn't have any cream cheese but would imagine it would be an excellent addition, especially for a special occasion.