Preheat oven to 425℉.
Start by mixing the dry ingredients together.
Mash the bananas well. I do this in my stand mixer with the paddle attachment.
Add the sugars, eggs, buttermilk, Greek yogurt, and vanilla to the bananas and mix will.
Add the dry ingredients and mix until just combined.
Fold in the chocolate chips, and let the batter sit for 30 minutes.
To get tall bakery style muffins line a cupcake pan with parchment paper tulips. These rise higher than the edge of the pan allowing you to put more batter in each one. You can use normal cupcake liners, but the muffins won't rise quite as much.Also try only lining half of the pan, this also helps with getting taller muffins. Bake the cupcakes for five minutes at 425℉. Then lower the temperature to 350℉ (do not open the oven door or take the cupcakes out, just lower the temp) and bake for an additional 15-18 minutes until a toothpick inserted into the middle of a muffin comes out clean.