Instructions
1. Prepare the oven and pan
Preheat the oven to 350°F (175°C). Grease and flour a 9×5-inch loaf pan, or line it with parchment paper.
2. Mash the bananas
In a large mixing bowl, mash the ripe bananas until mostly smooth. You should have about 1½ cups.
3. Mix the wet ingredients
Add the melted butter, oil, brown sugar, eggs, buttermilk (or yogurt), and vanilla. Whisk until the mixture is smooth and fully blended.
