In a bowl, cream together butter, brown sugar and white sugar. Beat in egg and vanilla extract.
In another bowl, combine oats, flour, baking soda, salt, cinnamon, nutmeg, ginger, allspice and cloves. Stir oat mixture into sugar mixture and mix in pumpkin spice morsels.
Drop spoonfuls of cookie dough onto cookie sheets.
Bake for 10 minutes, or until done.
Remove from oven and slightly flatten cookies with a spatula. Allow cookies to cool on sheets for 5 minutes. Then transfer cookies onto a wire rack to cool completely.
Pumpkin Spice Buttercream Filling
In a bowl, cream butter and then beat in confectioners' sugar, vanilla, cinnamon, nutmeg, ginger, allspice and cloves.
Spoon a tablespoon of filling onto a cookie and top it with another cookie. Repeat with remaining cookies.
Recipe by Sugar, Spice and Family Life at https://sugarspiceandfamilylife.com/2015/10/pumpkin-spice-oatmeal-cookie-sandwiches-recipe.html