First up: making the oatmeal cookies (which would be scrumptious all by themselves. So if you get distracted by the newest episode of Modern Family before you make the filling, that's okay too). Take a stick of softened, unsalted butter and cream it with 1/2 cup sugar and 3/4 brown sugar (I like the dark stuff) with a mixer.
Next add an egg and 2 teaspoons of vanilla extract and blend well.
In a separate bowl, combine 1/2 teaspoon of baking soda, 1/2 teaspoon of cinnamon, 1 cup all-purpose flour, and 1 and 2/3 cup old-fashioned rolled oats, and mix together.
Take this concoction and slowly mix it into the butter/sugar/egg mixture until just combined.
Now would be a good time to dunk your finger in and taste it. Just be sure to turn off the mixer first.
Cover the bowl and refrigerate the dough for at least an hour. This apparently prevents the cookies from getting too flat. If after an hour, you've managed to not eat all of the chilling dough, take it out of the fridge, preheat your oven to 325 degrees and line a cookie sheet or two with some parchment paper. Take about 2 teaspoons of dough, roll it into a ball, and then put it on the cookie sheet. Mine were probably slightly bigger than the original recipe's....I always seem to have a heavy hand when it comes to cookie size.
Bake the cookies for about 9 minutes, until the edges look a bit golden. Let them cool for a few on the tray and then transfer them to a wire rack.
As the cookies are cooling, you can make the pumpkin cream cheese filling. But, before you begin, you should probably try one of the oatmeal cookies while they are still warm. Actually, better make it two so you don't have an uneven number to turn into sandwiches. You'll need your strength to make this very difficult filling, after all. Go back to your mixer and blend together 4 oz. of softened cream cheese, 2 tablespoons of unsalted, softened butter, 1/4 cup pumpkin puree, 1 teaspoon ground cinnamon, and 3/4 teaspoon pumpkin pie spice (I'd recommend Trader Joe's version, which has a dash of cardamom and lemon peel, but if you don't have any, you can improvise by mixing together 1/4 teaspoon each of nutmeg, ground cloves, and ground ginger) at medium speed until smooth.
Mix in 2-2.5 cups of powdered sugar, depending on how sweet you like it. I put in the entire 2.5 cups because I am personally of the opinion that you can never add too much powdered sugar.
Aren't they gorgeous? You might want to take a picture because they certainly won't last long.
Isn't pumpkin season grand?