Preheat oven to 190 degree C. Line a baking pan with parchment paper and set aside.
Take butter and both sugar in a bowl and whisk well. Add vanilla and mix well.
Add in egg and mix well.
Add in oats, flour, cinnamon, baking soda, salt and cloves. Mix well.
Now take a small portion and place it on the baking pan. Pop it in oven and bake for 10 mins till it gets golden brown. Remove it and set aside to cool completely.
Take a cooking and spread buttercream under side and sandwich with another cookie.
Chill for 30 mins to firm up.