Preheat oven to 350-degrees and line two baking sheets with parchment paper.
Cream vegan buttery stick and sugars together in a large bowl.
Add vanilla and banana to the buttery stick/sugar mixture and mix until the mixture is smooth and no more banana lumps remain.
In a second bowl, combine flour, baking soda, salt and cinnamon.
Add the flour mixture to the butter/banana mixture in 3 increments until the ingredients are completely combined.
Add the oatmeal to the mixture in 3 increments until the oatmeal is completely mixed throughout.
Scoop spoonfuls of the dough onto the parchment paper-line baking sheets.
Place in the oven for 13-15 minutes.
Remove from the oven--they will not look "done" but they are. Do not leave them in the oven for longer than 17 minutes or they will burn.
Allow cookies to cool completely.
Serve!
