In separate bowl mash all 6 bananas until smooth and creamy. Add mashed bananas to sugar and spectrum mixture and mix until smooth.
Add flour and baking soda and mix until entire mixture is incorporated.
Pour into lightly greased and floured 13 x 9 inch cake pan and bake at 350F for 20 minutes.
After 20 minutes take out of the oven and sprinkle brown sugar evenly over top of loaf. Bake for an additional 20 minutes.
At the end of the 20 minutes, turn on broiler and keep loaf under broiler until the brown sugar is all melted and caramelized. Take out of the oven and let it cool thoroughly before enjoying.
Serves 12 to 15.