Preheat oven at 170 degree C for 5 minutes. Grease a loaf tin and line with a butter paper and keep aside.
Take a bowl and sieve all purpose flour, baking powder, baking soda and salt. Keep aside.
In another bowl take melted butter and oil together.
Add sugar into it and cream it well.
Next add eggs one at a time and beat well.
Add few drops of vanilla essence and mix well.
Next add dry ingredients mixture in to wet ingredients and add milk as required and fold them.
Take 1/4 cup of chocochip and mix with the batter.
Pour the batter in the prepared loaf tin and sprinkle the remaining chocochip on top.
Bake in the oven at 170 degree C for 35 to 40 minutes or unless a toothpick comes out clean.