Begin by preheating your oven to 350°F and prepare a greased and floured loaf pan measuring 9.25 x 5.25 x 2.75 inches.
For the Banana Bread:
Toast the walnuts in a skillet over medium heat until golden, stirring frequently. Chop them coarsely once cooled.
In a mixing bowl, cream the softened butter and sugar together until you achieve a smooth and fluffy consistency.
Mash the ripe bananas with a fork until they're chunky, then mix them into the butter-sugar combination along with the lightly beaten eggs.
In another bowl, whisk together the flour, baking soda, and salt before gradually incorporating this mixture into the wet ingredients, stirring until just combined.
Add the vanilla extract and gently fold in the chopped walnuts and raisins.
Transfer the batter into the prepared loaf pan, smoothing out the top, and bake for 55-60 minutes. It’s finished when a toothpick inserted in the center comes out clean.
Once baked, allow the banana bread to cool in the pan for about 10 minutes before moving it to a wire rack to cool completely.