6tablespoonsunsalted buttermelted, plus more for greasing
1teaspoonvanilla extract
2tablespoonsrumoptional (Captain Morgan brand)
Instructions
Preheat the oven to 350°F (175°C). Grease a 9x5-inch (23x12 cm) loaf pan. Add the walnuts to a rimmed baking sheet and toast in the oven until fragrant, about 5 to 10 minutes. Let cool.
In a large bowl, combine the flour, walnuts, brown sugar, baking soda, and salt. In a medium bowl, stir together the mashed bananas, yogurt, eggs, butter, and vanilla. If using, add the rum.
Lightly fold the banana mixture into the dry ingredients using a rubber spatula, mixing just until combined. The batter should be thick and chunky. Scrape the batter into the prepared loaf pan.
Bake the banana bread until the surface is golden brown and a cake tester inserted in the center comes out clean, about 55 minutes. Let the banana bread cool in the pan for 5 minutes. Then, remove it from the loaf pan, slice, and serve warm.