Preheat oven to 350° F.
Grease and line a 9x5 loaf pan with parchment paper and set aside.
In a large bowl, add melted butter, cooled bananas, brown sugar, eggs, sour cream, oil, and vanilla extract, and whisk until all is completely incorporated.
6 tablespoon (84 g) unsalted butter, melted and cooled, ¾ cup (150 g) dark brown sugar, packed, 2 (112 g) large eggs, room temperature, 1 teaspoon (4 g) vanilla extract, ¼ cup (65 g) sour cream, room temperature, ¼ cup (56 g) neutral oil
Sift in the flour, baking soda, and salt and mix until JUST combined. Do not over mix your batter.
2 cups (240 g) all purpose flour, 1 teaspoon (4 g) baking soda, ½ teaspoon (3 g) salt
Pour the batter into the prepared pan, then top with the slices of banana and sprinkle with turbinado sugar.
turbinado sugar
Bake in middle rack of preheated oven for 50-60 minutes until a toothpick inserted comes out clean. Mine took around 55 minutes.
Let cool for at least 15 minutes before removing from pan. Enjoy warm or at room temperature.
Store leftovers in airtight container.