Step 1

Make the cookies: Preheat the oven to 350°F and set aside 1-2 lined baking sheets.

Step 2

Whisk together the flour, baking soda, salt, and pumpkin spice in a medium mixing bowl.

Step 3

In a separate, large bowl, beat the pumpkin puree, butter, sugars, and vanilla.

Step 4

Add the dry mixture to the wet and mix until just combined.

Step 5

Fold in the oats.

Step 6

Use a scooper to place rounded scoops of dough (about 2 tbsp each) on a lined baking sheet. Flatten each slightly using your fingers or the bottom of a cup.

Step 7

Bake for 9-11 minutes. Set aside to cool completely.

Step 8

Make the buttercream: Add the butter to a large mixing bowl and beat for about a minute.

Step 9

Add in the powdered sugar and pumpkin spice and continue to beat for another minute or so.

Step 10

Add milk, as necessary, to reach the desired consistency.

Step 11

Assemble: For each pie, spread or pipe the frosting on the bottom of one cookie and top with another cookie. Enjoy!