Preheat Oven: Preheat oven to 350 degrees F.
Mix Dry Ingredients: Add flour, pumpkin pie spice, salt, and baking soda to a medium-sized bowl and mix well.
Cream Butter and Sugar: Add brown sugar and butter to a large bowl and cream with a hand mixer for 1-2 minutes. Add maple syrup, pumpkin puree, vanilla extra, and the egg and mix together for another 1-2 minutes.
Add Flour: Add flour 1/3 at a time to the butter and sugar and gently mix with a spatula. Once all of the flour is mixed in, add the oats and fold until all well incorporated.
Add to Baking Trays: Add 2 tablespoon scoops of dough onto a parchment lined or cookie-liner baked baking tray. No need to keep a lot of space between because these cookies do not spread.
Bake: Bake for 10 minutes and then rotate the baking sheets in the oven and bake for another 8-10 minutes until the edges are golden brown.
Create Icing: While the cookies cool, add confectioner's sugar and pumpkin pie spice to a bowl. Whisk together and then add water and mix until well combined. Add more water (a teaspoon at a time) if you want a looser icing.
Ice the Cookies: Once the cookies have cooled, add icing. Dip them, spread a layer on top, or drizzle, whatever you prefer.
Enjoy!