Step 1:
Preheat your oven to 350°F (175°C). Grease and line a 9x5-inch loaf pan with parchment paper.
Step 2:
In a large mixing bowl, whisk together mashed bananas, melted butter, and sugar until smooth and well combined.
Step 3:
Add eggs and vanilla extract to the banana mixture. Mix until fully incorporated.
Step 4:
In a separate bowl, sift together flour, baking soda, salt, and cinnamon.
Step 5:
Gradually add the dry ingredients to the banana mixture. Stir until just combined (don't overmix).
Step 6:
Fold in chopped walnuts gently until evenly distributed.
Step 7:
Pour the batter into the prepared loaf pan. Spread it evenly with a spatula.
Step 8:
Bake for 50 minutes or until a toothpick inserted in the center comes out clean.
Step 9:
Allow the bread to cool in the pan for 10 minutes. Transfer to a wire rack to cool completely.
Step 10:
To make the espresso glaze, whisk together powdered sugar, brewed espresso, and vanilla extract until smooth and pourable.
Step 11:
Drizzle the glaze over the cooled banana bread. Allow it to set for 10 minutes before slicing.