Preheat the oven to 350 degrees Fahrenheit (175 degrees Celsius). Grease a 9x5 inch loaf pan, and set aside.
In a large mixing bowl, use a fork to mash the bananas until smooth and creamy.
3 very ripe medium bananas
In a second large bowl, combine the melted butter and granulated sugar. Whisk together until well combined. Add the eggs and vanilla extract to the bowl, and whisk again until smooth.
1/2 cup 1 stick unsalted butter, melted, 1 cup granulated sugar, 2 large eggs, 2 teaspoons vanilla extract
Stir in the salt, sour cream, mashed bananas, and baking soda.
1/2 cup sour cream or Greek yogurt, 1 teaspoon kosher salt, 1 teaspoon baking soda
Sift the all-purpose flour into the wet ingredients, and mix until just combined.
1 3/4 cups all-purpose flour
In a separate bowl, mix together the coarsely chopped pecans, maple syrup, brown sugar, unsalted butter, and a pinch of salt. This mixture will go on the bottom of the baking dish before adding the banana bread batter.
3/4 cup pecans, 1/4 cup pure maple syrup, 1/3 cup firmly packed brown sugar, 6 Tablespoons unsalted butter, Pinch of salt to taste
Pour the prepared banana bread batter into a greased 9x5 inch loaf pan.
Bake in the preheated oven for 55-60 minutes or until a toothpick inserted into the center of the bread comes out clean. Note: If banana bread starts to brown too much, and a toothpick inserted is still not clean, loosely cover with foil, and continue to back until a tooth pick is clean.
Allow the banana bread to cool in the pan for about 15 minutes. Then, invert it onto a wire racke, and allow to cool completely.