Step 1: Prepare the Oven and Pan: Preheat the oven to 350F (175C). Grease and flour a 9x5 inch loaf pan. This prevents the cake from sticking and ensures easy removal. Alternatively, line the pan with parchment paper, leaving an overhang for easy lifting.
Step 2: Combine Dry Ingredients: In a medium bowl, whisk together the flour, baking soda, and salt. Whisking ensures the baking soda is evenly distributed, which helps the cake rise properly. Set aside the dry ingredients.
Step 3: Cream Butter and Sugar: In a large bowl, cream together the softened butter and granulated sugar until light and fluffy. This process incorporates air into the batter, resulting in a tender cake. An electric mixer is recommended for this step but can be done manually with a wooden spoon.
Step 4: Add Eggs and Vanilla: Beat in the eggs one at a time, then stir in the vanilla extract. Ensure each egg is fully incorporated before adding the next. The vanilla enhances the overall flavor of the cake.
Step 5: Combine Wet and Dry Ingredients: Gradually add the dry ingredients to the wet ingredients, alternating with the buttermilk, beginning and ending with the dry ingredients. Mix until just combined. Do not overmix, as this can result in a tough cake. Overmixing develops gluten, leading to a less tender crumb.
Step 6: Fold in Mashed Bananas: Gently fold in the mashed ripe bananas. Be careful not to overmix at this stage, as it can cause the cake to become dense. The bananas provide moisture and sweetness to the cake.
Step 7: Bake: Pour the batter into the prepared loaf pan and bake for 50-60 minutes, or until a wooden skewer inserted into the center comes out clean. Baking times may vary depending on the oven.
Step 8: Cool: Let the cake cool in the pan for 10 minutes before transferring it to a wire rack to cool completely. Cooling the cake completely prevents it from crumbling when sliced.
Optional Tip: For a richer flavor, brown the butter before creaming it with the sugar. To do this, melt the butter in a saucepan over medium heat and cook until it turns a golden-brown color with a nutty aroma. Let it cool slightly before using in the recipe.
Optional Tip: Add cup of chopped walnuts or chocolate chips to the batter for added flavor and texture.