Preheat your oven to 350°F (175°C) and grease a 9x5-inch loaf pan.

Mash very ripe bananas in a large mixing bowl until smooth.

Mix melted unsalted butter into the mashed bananas, followed by granulated sugar.

Incorporate large eggs one at a time, mixing well after each addition.

In a separate bowl, whisk together all-purpose flour, baking soda, salt, ground cinnamon, and nutmeg.

Gradually fold the dry mixture into the wet mixture until no flour streaks remain.

Fold in any optional nuts if desired.

Pour the batter into the prepared loaf pan and tap it on the counter to release air bubbles.

Bake in the preheated oven for 55 to 65 minutes, checking for doneness.

Let the bread cool in the pan for about 15 minutes before transferring to a wire rack.