Start by preheating your oven to 350°F (175°C). Prepare a loaf pan by lightly buttering and flouring it so the bread releases easily after baking.
In a mixing bowl, cream the softened butter and sugar together until light and smooth. Add the lightly beaten eggs and mix until fully incorporated.
Mash the bananas with a fork until you have a chunky, soft texture—similar to applesauce. Add them to the bowl along with the vanilla extract and greek yogurt and mix everything until combined.
In a separate bowl, whisk together the flour, baking soda, and salt. Add the dry ingredients to the wet mixture and stir gently until just incorporated. Avoid overmixing—keep the batter relaxed.
Fold in most of the chocolate chips, then transfer the batter into your prepared loaf pan. Sprinkle the remaining chocolate over the top.
Bake for 55–65 minutes, or until a toothpick inserted into the center comes out clean. Let the bread rest in the pan for about 10 minutes, then transfer it to a wire rack to cool completely.