Step 1

Place flour, baking powder, baking soda and salt in a bowl and whisk to combine; set side.

Step 2

In a separate bowl combine sugar and eggs and whisk to until well combined and mixture becomes thick and light in color, about 1 minute. Drizzle cool butter into mixture and whisk to combine. Add oil and buttermilk to mixture, whisk to combine. Add in vanilla,mashed banana mixture and mini chocolate chips, whisk to combine.

Step 3

Pour flour mixture into wet mixture, and using a wooden spoon or sturdy spatula, gently fold the batter until no flour streaks or pockets remain (do not over mix).

Step 4

Fill liners to almost full. Bake at 375 degrees for 17-20 minutes or until tops become golden brown and tester comes out clean. Remove from oven and transfer muffins to a wire rack to cool.