Here is the recipe which i got in the internet.
Ingredients
3 or 4 ripe bananas, smashed
1/3 cup melted butter
1 cup sugar (can easily reduce to 3/4 cup)
1 egg, beaten
1 teaspoon vanilla
1 teaspoon baking soda
Pinch of salt
1 1/2 cups of all-purpose flour
Method
No need for a mixer for this recipe. Preheat the oven to 350°F (175°C). With a wooden spoon, mix butter into the mashed bananas in a large mixing bowl. Mix in the sugar, egg, and vanilla. Sprinkle the baking soda and salt over the mixture and mix in. Add the flour last, mix. Pour mixture into a buttered 4x8 inch loaf pan. Bake for 1 hour. Cool on a rack. Remove from pan and slice to serve.

The changes i made to it, i added orange juice instead of vanilla essence and used brown sugar instead of the regular sugar. And added dried berries and mixed it at the end. Baked the cake at 350 degrees for 45 mins. And the cake is ready.
It came out like the plum cake in India, which I used to love in my childhood.
mmmm.....YUMMY! my kids loved it.