Preheat the oven to 350°F (175°C). Line a 9×5-inch loaf pan with parchment paper or grease lightly with oil.
In a large bowl, mash the bananas, leaving a few chunks for texture. Add the oil, melted butter, granulated sugar, light brown sugar, eggs, milk, vanilla extract, and vanilla bean paste. Mix until well combined.
2 medium Bananas,, 2 tablespoons Canola oil, 1/3 cup (80 grams) Unsalted butter,, 1/3 cup (67 grams) Granulated sugar, 1/4 cup (55 grams) Light brown sugar, 2 large Eggs,, 1/4 cup (62 grams) Whole milk,, 1 teaspoon Vanilla extract, optional* 1/2 teaspoon Vanilla bean paste
In a separate bowl, whisk together the flour, baking soda, salt, cinnamon, and walnuts.
1 1/3 cup (180 grams) All-purpose flour, 1 teaspoon Baking soda, 1/2 teaspoon Salt, 1/4 teaspoon Ground cinnamon, 1/4 cup Walnuts,
Add the dry ingredients to the wet ingredients. Using a spatula, gently fold until just combined. Pour the batter into the prepared loaf pan and sprinkle the top with extra walnuts and turbinado sugar.
optional* 2 teaspoons Turbinado sugar
Bake for 50 to 60 minutes, or until a toothpick inserted into the center comes out clean. Remove from the oven and let cool before slicing.