Preheat the oven to 375 degrees. Grease a 12-cup muffin tin. Whisk the dry ingredients together in a large bowl. Beat together the ripe bananas, eggs, butter and maple syrup in the bowl of your blender or with an eggbeater.
Stir into the dry mixture, just mixing. Stir in the chocolate chips. Portion into muffin tin and bake until a toothpick comes out clean, about 15 – 18 minutes.
Let cool on a rack. These muffins freeze well. Makes 12 muffins.