In a food processor or blender, combine the eggs, Greek yogurt, bananas, vanilla extract and coconut sugar until smooth 1-2 minutes.
Add the oats, cocoa powder, baking powder, baking soda and salt to the batter. Process another minute or so until the oats are broken down and combined with the wet ingredients.
Test the batter at this point to ensure it meets your liking. I prefer less sugar in my baked goods, but if you like more you can add more coconut sugar if you like.
Remove batter from the food process and stir in the chocolate chips reserving a few chiips for the top.
Transfer the batter to the prepared loaf pan and sprinkle the remaining chips on top.
Bake 50-55 minutes or until a toothpick can be removed clean from the center. Remove from the oven and cool in the pan 60 minutes before slicing.
Notes
Storing - Store this healthy banana bread with yogurt up to 10 days in the refrigerator or in the freezer up to 60 days.
Greek yogurt - Substitute a dairy-free version like coconut or almond yogurt.
Oats - I haven't tested other flours, however, almond flour generally can be subbed for oats. I recommend spooning the almond flour into a measuring cup loosely. Do not pack or it will be too much flour. Use this recipe for a coconut flour banana bread recipe.
Coconut sugar - You can substitute maple syrup or maple sugar. Monk fruit or another zero calorie sweetener like Truvia can also be used.