Step 1

Preheat the oven to 350 degrees F. and line the cookie sheets with parchment paper.

Step 2

In a large bowl with a hand-held or electric mixer, mix together the butter and sugars until fluffy. Add in the eggs and vanilla and mix well.

Step 3

In a medium bowl, whisk together the flour, baking soda, cinnamon, and salt. Slowly add the dry mixture to the wet mixture until just mixed. Add in the oats and mix until combined.

Step 4

Use a large cookie scoop (3 tablespoons) and place the dough on the tray. Bake for approximately 15 minutes or until golden brown. Allow the cookies to cool completely before piping with cream filling.

Step 5

In a medium bowl using a hand-held or standing mixer, beat the butter on high-speed for approximately 5 minutes.

Step 6

Turn down the speed and add in the powdered sugar until fully blended. Add in the vanilla and milk and mix until combined. Turn speed back to high and mix for approximately 5 minutes or until fluffy.

Step 7

Pipe the cream on the bottom of the cookie and close the sandwich with another cookie