Preheat your oven to 350°F (170°C) and line the 9x5 loaf pan with parchment paper.

Mash 3-4 medium bananas until smooth, aiming for about 1½ cups.

In a large mixing bowl, whisk together 2 cups of all-purpose flour, 1 teaspoon of baking soda, and ½ teaspoon of salt.

Melt ½ cup of unsalted butter in a microwave-safe bowl and let it cool slightly.

Add ½ cup of sugar, mashed bananas, ½ cup of yogurt or sour cream, 2 teaspoons of vanilla extract, and 2 large eggs to the melted butter and mix until creamy.

Gently fold the dry ingredients into the wet mixture until just combined.

Melt the Nutella in a small bowl until drizzling consistency.

In the loaf pan, layer half the batter, drizzle half of the Nutella, and create swirls, then repeat.

Bake for 55 to 65 minutes, checking doneness with a toothpick.

Cool in the pan for 15 minutes before transferring to a wire rack.