1.33cupunsalted butter, melted and slightly cooled
1teaspoonbaking soda
1pinchfine sea salt
0.75cupgranulated sugar
1largeegg, beaten to blend
1teaspoonpure vanilla extract
1.5cupall-purpose flour, sifted
2teaspoonsground cinnamon
2tablespoonsgranulated sugar
Instructions
Begin by preheating your oven to 350°F (175°C). Prepare a 4x8 inch loaf pan by greasing it with butter or oil, or line it with parchment paper to facilitate easy removal of the bread.
In a large mixing bowl, combine the melted butter with the mashed bananas, stirring until you achieve a smooth integration of the two ingredients.
Add in the baking soda and a pinch of salt, mixing well. Then, incorporate the sugar, beaten egg, and vanilla extract into the banana mixture until fully blended and smooth.
Gently fold in the sifted all-purpose flour into the mixture. Stir until just combined, being careful not to overmix. The batter should remain slightly lumpy for best results.
In a separate small bowl, mix together the ground cinnamon and 2 tablespoons of granulated sugar to create the swirl mixture.
Pour half of the banana bread batter into the prepared loaf pan, smoothing the top with a spatula. Evenly sprinkle half of the cinnamon-sugar mixture over this layer.
Carefully pour the remaining banana bread batter over the first layer, ensuring an even spread. Top this layer with the remaining cinnamon-sugar mixture. Using a butter knife or skewer, gently swirl the batter to create a marbled effect; avoid overmixing to preserve the defined swirls.
Place the loaf pan in the preheated oven and bake for approximately 60-65 minutes. Check for doneness by inserting a toothpick into the center; it should come out clean with a few moist crumbs attached.
Once baked, remove the loaf from the oven and let it cool in the pan for about 10 minutes. Carefully transfer the bread to a wire rack to cool completely before slicing.
Notes
Serve warm and consider adding powdered sugar or whipped cream for presentation.