1-First Step: Begin by preheating your oven to 350°F. It is crucial to have the oven fully heated before the batter goes in to ensure the bread rises correctly. While the oven heats up, prepare your loaf pan. Grease and flour a 9.25-inch long by 5.25-inch wide by 2.75-inch deep pan. This prevents the bread from sticking and ensures it releases easily after baking.

2-Second Step: If you are using walnuts, take a moment to lightly roast them. Place the walnuts on a dry pan over medium heat, stirring continuously to avoid burning. Once they are fragrant and slightly browned, remove them from the heat. Chop them into bite-sized pieces and set them aside to cool to room temperature. Roasting the nuts is a small step that makes a big difference in flavor.

3-Third Step: In a large mixing bowl, cream together the softened unsalted butter and the sugar. Beat them until the mixture is light and fluffy. This process incorporates air into the batter, which contributes to a lighter texture in the final bread. Ensure your butter is at room temperature so it blends smoothly without leaving lumps.

4-Fourth Step: Prepare the bananas. Peel the 3 very ripe bananas and place them in a separate bowl. Mash them with a fork until they reach a chunky applesauce consistency. You want some small pieces remaining for texture, but not large chunks. Add the mashed bananas to the butter mixture along with the 2 lightly beaten eggs. Mix everything until just blended.

5-Fifth Step: In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. It is important to whisk these dry ingredients to distribute the baking soda evenly. Gradually add the dry flour mixture to the wet batter. Stir gently until you no longer see streaks of flour. Be careful not to overmix, as this can make the bread tough.

6-Sixth Step: Finish the batter by stirring in the vanilla extract, the chopped roasted walnuts, and the raisins. Pour the batter into your prepared loaf pan. Use a spatula to smooth the top, ensuring it is even.

7-Seventh Step: Place the pan in the center of the oven. Bake for 55 to 60 minutes. Every oven is different, so start checking around the 55-minute mark. The bread is done when a toothpick inserted in the center comes out clean or with just a few moist crumbs attached.

8-Eighth Step (Optional but Recommended): If you notice the edges of the bread browning too quickly before the center is done, create a foil tent. Cover the top of the loaf loosely with aluminum foil for the last 10 to 15 minutes of baking. This protects the crust from burning while the inside finishes cooking.

9-Final Step: Once baked, remove the pan from the oven. Let the banana bread rest in the pan for 10 minutes. This resting period allows the structure to set, making it easier to remove. After 10 minutes, carefully transfer the loaf to a wire rack to cool completely. Slicing the bread while it is too hot can cause it to crumble.