Preheat the oven to 325 degrees F
In a large bowl, combine the oats, flour, sugar, and spice and stir till mixed.
Add the butter, vanilla, and pumpkin and stir till fully combined.
Scoop a heaping tablespoon of batter and roll to form a ball. Place on cookie sheet and gently pat to flatten and create desired shape (cookies will not spread).
Bake for 11 to 14 minutes or until the cookies are golden brown on top.
Remove from the oven and let cool for 10 minutes.
Optional - If adding sugar glaze/drizzle, mix the powdered sugar, milk, and vanilla extract together in a small bowl until fully combined. Drizzle cookies and allow sugar to set before serving.