Preheat your oven to 350°F (175°C). Grease and flour a bundt cake pan or a regular cake pan.
Blend the wet ingredients: In a blender, combine the mashed bananas, eggs, sugar, vanilla extract, greek yogurt, and milk. Blend until smooth and creamy.
Pour the mixture: into a large mixing bowl and whisk in the oil. (Don't put the oil in the blender or it will emulsify creating a heavier more dense cake.)
Sift the dry ingredients: Into the large mixing bowl with the wet mixture. Stir until just combined. Avoid overmixing to keep your cake light and fluffy.
Bake: Pour the batter into your prepared pan. Bake for about 45 minutes, or until a toothpick inserted into the center comes out clean.
Cool: Let the cake cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely.
Prepare the ganache: in a medium sauce pan combine the chocolate chips, butter, and condensed milk. Heat over medium/low. Be careful not to burn the chocolate as it will not come out smooth. Stir frequently until melted together and add in the milk to get the perfect pourable consistancy. If its too thick add more milk.
Pour: The ganache over the cake. If you made a bundt cake pour some of the ganache in the center hole, true Brazilian style!
Enjoy: Slice and serve your Chocolate Covered Banana Cake with a cup of coffee or tea. Savor the moist, flavorful goodness in every bite! Don't forget to spread some of the extra center ganache on top!