01 -
Set your oven to 350°F and use parchment paper to cover the baking trays.
02 -
Combine oats, flour, baking soda, salt, cinnamon, and other spices in a bowl.
03 -
Beat one cup of butter and both sugars until airy. Stir in molasses.
04 -
Mix in the egg first, followed by the yolk and vanilla.
05 -
Gradually blend the dry ingredients into the wet mix until smooth.
06 -
Drop 1 1/2 tablespoon-sized scoops on lined trays, spaced apart, and flatten each slightly.
07 -
Bake one tray at a time for about 9 minutes, leaving the cookies slightly soft at the edges. Let them cool on the tray first, then move to a wire rack.
08 -
Whip the cream cheese and butter together until creamy. Add powdered sugar and vanilla, then beat a couple more minutes until fluffy.
09 -
Use the filling to sandwich cooled cookies. Keep finished sandwiches in the fridge for storage.