01 -
Preheat oven to 175°C. Line baking sheets with parchment paper.
02 -
In a large bowl, beat together softened butter, brown sugar, and white sugar until light and fluffy using an electric mixer.
03 -
Add eggs one at a time and vanilla extract, mixing well until fully integrated.
04 -
In a separate bowl, whisk together all-purpose flour, baking soda, ground cinnamon, and salt.
05 -
Gradually add the dry ingredients to the creamed mixture, beating on low speed until just combined.
06 -
Stir in oats until evenly incorporated into the dough.
07 -
Using a large (approximately 3-tablespoon) scoop, place evenly sized portions of dough onto prepared baking sheets, spacing apart for spread.
08 -
Bake for 15 minutes or until cookies are golden brown around the edges. Allow to cool fully on a wire rack.
09 -
In a clean bowl, beat softened butter on high speed for 5 minutes until creamy. Reduce mixer speed and gradually add confectioners’ sugar, blending thoroughly.
10 -
Add vanilla extract and milk. Mix until smooth, then beat on high for an additional 5 minutes until fluffy.
11 -
Pipe or spread a generous amount of cream filling on the underside of half the cookies. Top each with another cookie to form sandwiches.