Preaheat oven to 350°F.

Grease a loaf pan and dust lightly with flour (tap the excess flour).

Mix well flour, sugar, baking soda and salt with whisker in a mixing bowl.

Mix well mashed banana, egg, melted butter and vanila extract with whisker in another bowl.

Pour banana mixture into flour. Stir until the batter smooth.

Add in 3/4 of the chocolate chip. Stir it.

Pour the batter into the pan.

Sprinkle with the remaining chocolate chip.

Bake for 50 minutes or until the toothpick comes out clean.