Preheat the oven to 350 degrees.
In a large bowl cream together the butter and brown sugar.
Add in the vanilla and mashed banana and mix well.
In a medium bowl combine the flour, baking soda, cinnamon, and salt. Mix well.
Add the dry ingredients to the wet ingredients and mix well to combine.
Fold in the chocolate chips.
Using a 2 Tablespoon cookie scoop, scoop the dough onto a baking sheet spaced 2 inches apart.
Bake for 11-12 minutes. Remove from oven and cool for 1 minute before removing to a cooling rack to cool completely.