Step 1

Preheat the oven to 350 degrees F (175 degrees C). Grease a 12-cup muffin tin or line cups with paper liners.

Step 2

Combine flour, sugar, baking powder, baking soda, and salt in a large bowl.

Step 3

Mix oil, yogurt, egg, and vanilla together in a separate bowl until well combined; stir into flour mixture until smooth. Gently fold in mashed bananas and chocolate chips. Spoon batter into the prepared muffin cups, filling each 2/3 full.

Step 4

Bake in the preheated oven until tops spring back when lightly pressed, about 22 to 25 minutes. Cool briefly in the tin, then transfer to a wire rack to cool completely.