Preheat oven to 425 degrees.

In a small bowl combine the filling ingredients until well blended.

In a large bowl, whisk together the four, sugar, baking powder, baking soda, and salt for the dough.

Mix in the buttermilk, banana, and 2 Tbsp of the melted butter until a soft dough forms. Knead dough on a floured surface 3 times.

Using your hands, press dough out into a 10" by 14" rectangle.

Spread the 2 Tbsp remaining melted butter over the dough.

Sprinkle filling mixture over the dough leaving 1/2 inch of the edges of the dough uncovered.

Roll up from the shortest side and cut into 9 even slices.

Spray a 8 x 8 inch pan with cooking spray and place the slices into the pan.

Bake at 425 degrees for 18-20 minutes. Allow to cool.

While cooling, mix up the frosting ingredients in a bowl until well blended.

Spread frosting over the rolls while still warm and serve. Serves 9.