Preheat your oven to 375°F (190°C) and prepare a baking dish by greasing it lightly with butter or cooking spray.

In a large bowl, whisk together the flour, granulated sugar, baking powder, baking soda, and salt.

In another bowl, mix the softened butter, mashed bananas, buttermilk, and egg until well combined.

Gradually add the wet ingredients into the dry ingredients, stirring until just combined. Avoid overmixing.

On a lightly floured surface, roll out the dough into a rectangle, about 1/4 inch thick.

Spread softened butter evenly over the dough rectangle.

In a small bowl, combine the ground cinnamon and brown sugar. Sprinkle this mixture generously over the buttered dough.

If you’re using nuts, sprinkle them over the cinnamon mixture.

Carefully roll the dough into a tight log, starting from one long side to the other.

Slice the rolled dough into equal pieces, about 1 to 1.5 inches thick, to form the rolls.

Place the rolls in the prepared baking dish, allowing them to slightly touch each other.

Bake in the preheated oven for 20-25 minutes or until golden brown.

While the rolls bake, prepare the glaze by mixing powdered sugar, milk, and vanilla extract in a small bowl until smooth.

Once the rolls are baked, remove them from the oven and let them cool for a few minutes before drizzling the glaze over the top.