Preheat your oven to 350°F (175°C). Grease a 9x5 inch loaf pan with butter or non-stick spray to prevent sticking.

In a large mixing bowl, mash the ripe bananas with a fork until smooth. This adds moisture and sweetness to the bread.

Add the melted butter to the mashed bananas and mix well. The butter adds richness to the flavor.

Stir in the egg and vanilla extract until fully combined. This helps bind the ingredients together.

In a separate bowl, whisk together the granulated sugar, baking soda, salt, and sifted flour. This ensures even distribution of the dry ingredients.

Gradually add the dry mixture to the banana mixture, stirring until just combined. Be careful not to overmix, as this can make the bread dense.

In a small bowl, combine the brown sugar and ground cinnamon. This will create the sweet, spiced swirl in the bread.

Pour half of the banana bread batter into the prepared loaf pan, spreading it evenly.

Sprinkle half of the cinnamon sugar mixture over the batter. Use a spatula to gently press it down.

Pour the remaining banana bread batter on top and spread it evenly.

Finally, sprinkle the rest of the cinnamon sugar mixture on top, and use a knife to swirl it gently into the batter. This creates beautiful cinnamon swirls.

Place the loaf pan in the preheated oven and bake for 55-60 minutes, or until a toothpick inserted into the center comes out clean. This ensures the bread is fully cooked.

Once baked, remove the bread from the oven and let it cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely.

In a small bowl, whisk together the powdered sugar, milk, and vanilla extract until smooth. Adjust the milk to reach your desired glaze consistency.

Once the bread is completely cooled, drizzle the glaze over the top for a sweet finish.