In a bowl sift the dry ingredients. Keep aside.
In a mixie cream the butter and sugar. Add the egg and vanilla essence. Give it a mix.
Now add the curd and mix.
Start adding the banana puree and flour mixture alternatively and mix with a spoon.
Pour the batter in a greased baking dish.
Bake for 30 minutes at 190 degrees C or till the toothpick inserted comes out clean.
Cut and serve.
Key Ingredients: all purpose flour, baking powder, baking soda, salt, icing sugar, butter, egg, yogurt, banana, vanilla essence