Preheat oven to 350 degrees. Grease and flour a bundt cake pan and set aside.
In a large bowl, combine cake and pudding mixes and whisk until mixed.
Add eggs, oil and water. Mix until just combined, then fold in mashed bananas. Do not over mix!
Pour batter into prepared cake pan. Tap pan on counter top or floor to even out batter in pan.
Bake for 35 to 45 minutes or until toothpick inserted in the sent comes out with just a few tender crumbs. Be careful not to over bake.
Cool cake in pan on a rack. When cooled, use a thin spatula to loosen cake from the sides of the pan an remove cake to a plate.
This cake is very sweet, so there is no need to ice, just slice and serve!