Creating the Soft and Moist Banana Cake can be quite easy when you follow these step-by-step instructions:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C). Grease and flour a 9×5 inch loaf pan or a similar-sized cake pan.
2. Mash Bananas: In a large bowl, mash the ripe bananas until smooth. Make sure to remove any lumps.
3. Cream Butter and Sugar: In another bowl, cream the softened butter and granulated sugar together until light and fluffy.
4. Add Eggs and Vanilla: Beat in the eggs, one at a time, followed by the vanilla extract. Mix well until fully combined.
5. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking soda, and salt.
6. Combine Mixtures: Gradually add the dry ingredients to the wet mixture, alternating with the buttermilk. Mix until just combined.
7. Add Mashed Bananas: Fold in the mashed bananas gently into the batter until well incorporated.
8. Pour Batter: Pour the batter into the prepared pan, smoothing out the surface for an even bake.
9. Bake: Place in the preheated oven and bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
10. Cool: Remove from the oven and allow the cake to cool in the pan for about 10-15 minutes. Then, carefully transfer to a wire rack to cool completely.

By following these steps, you will have an amazing Soft and Moist Banana Cake ready for enjoyment.