In large mixing bowl, mash bananas with fork and beat in the oil, eggs, yogurt, sugar and vanilla until well combined. You could do that part in a stand mixer, but I’d recommend doing the rest of the mixing by hand. Mix in the flours, soda and salt and mix until just blended and no flour remains. Fold in the chocolate chips now if using. Spoon into 12 prepared cupcake tins and bake at 350 for 20-25 minutes (my oven is a tad slow and takes the full 25).