In a large bowl add mashed banana,butter,egg and vanilla essence and mix well.
In another bowl add all purpose flour,sugar powder,baking powder and baking soda and mix well.
Mix all the dry ingredients bowl in a butter n egg bowl.
Now batter is ready.
Grease aluminium tin.After greasing dust it.
Now pour the batter into the dish.
Back for 15 - 20 mins in the 150 degree in the pre heat oven.
Now the delicious banana muffins is ready.