In a sauce pan, melt butter and add brown sugar, cooking over medium heat stirring often until sugar is dissolved. About 10 minutes
Add sliced bananas and cook for another 3 minutes.
**If adding alcohol, add crème de banana and dark rum.
Remove from heat and allow to cool in refrigerator for 15 minutes
In a blender, add ice cream and 1 cup of banana mixture and blend. Add milk as needed to desired consistency.
If adding alcohol, you may use less milk.
Pour into a tall glass and top with whipped cream.
Garnish with brown sugar and serve.