Preheat oven at 220C(428F). In a bowl, mix together mashed bananas, brown sugar, white sugar, melted butter, egg, oil, yogurt, vanilla.
Then add, flour, baking powder, baking soda and salt. Mix a bit. Then add chocolate chip. Just mix to combine. Do not over mix.
Scoop batter onto muffin tin with liners. Divide into 6 portions. Top with more chocolate chips.
Bake for 5 minutes in a preheated oven at 220C(428F) then reduce temperature to 190C(374F) without opening the oven. Then bake for another 12 to 15 minutes.
Let it cool down. Serve and enjoy!
