Preheat oven to 350°F (175°C) and grease a 12-cup muffin tin or line with paper liners.
Place the oats, bananas, eggs, Greek yogurt, maple syrup, vanilla extract, baking powder, baking soda, and salt into a high-speed blender.
Process on high speed for 30 to 45 seconds until the batter is completely smooth and no whole oats remain.
Fold in the chocolate chips by hand using a spatula.
Portion the batter evenly into the prepared muffin tin cups, filling each approximately three-quarters full.
Bake for 18 to 20 minutes or until a toothpick inserted into the center of a muffin comes out clean.
Cool the muffins in the pan for 10 minutes before transferring them to a wire rack to cool completely.