1-First Step: Preparation and Mise en Place Preheat your oven to 350°F. Grease and lightly flour a 9×13-inch sheet pan or line with parchment for easy release. Mash 3-4 ripe bananas until smooth, measuring 1.5 cups. Gather all ingredients to streamline mixing. Set aside the pan and mashed bananas.

2-Second Step: Mix Dry Ingredients In a medium bowl, whisk together 2 cups flour, 1 tsp baking soda, 1 tsp cinnamon, and ½ tsp salt. Whisk thoroughly to remove lumps and distribute leaveners evenly. Avoid packing the flour; spoon it lightly into the measuring cup.

3-Third Step: Cream Wet Ingredients Beat ¾ cup softened butter and 1.5 cups sugar in a large bowl until light and fluffy, about 2-3 minutes with an electric mixer. Add 2 eggs one at a time, beating well after each. Mix in 1 tsp vanilla extract and the mashed bananas. The mixture should be creamy and smooth. If using, stir in ½ cup buttermilk now for extra moisture. Scrape down sides to incorporate everything.

4-Fourth Step: Combine Wet and Dry Mixtures Gently fold the dry ingredients into the wet mixture using a spatula. Stir just until combined, avoiding overmixing to keep the batter tender. Lumps are okay; they bake out.

5-Fifth Step: Spread and Bake Pour batter into the prepared 9×13 pan. Spread evenly with a spatula for uniform thickness. Bake at 350°F for 25-30 minutes. Test doneness with a toothpick in the center; it should come out clean or with moist crumbs. Rotate pan halfway if your oven heats unevenly. Cool in pan on a wire rack for 30 minutes.

6-Sixth Step: Prepare Cream Cheese Frosting Beat 8 oz softened cream cheese and ½ cup butter until smooth. Gradually add 4 cups powdered sugar, 1 tsp vanilla, and 1-2 tbsp milk. Beat until spreadable. Spread over cooled cake. Chill 15 minutes to set.

7-Final Step: Finishing Touches and Serving Cut into squares. Garnish with walnuts or banana slices if desired. Serve at room temperature.