Preheat oven to 375°F

In a bowl, mix the first 4 ingredients and set aside

In another bowl, mix sugar, oil, extract and eggs and beat on medium speed for 2 min. Add mashed bananas and mix another 1 min

Pour 1/2 the flour into the mixture and mix for few seconds until combined

Mix in the sour cream until well blended.

Next put in the rest of the flour mix until just Blended, do NOT overmix.

Stir in chocolate chips

Fill 12 muffin tins, or 24 mini muffin tins. I baked these minis for 14 minutes. Regular size muffins I'd say 20-24 min