Copycat Oatmeal Creme Pies

Cookies:
1 1/4 cup softened butter
1 cup packed brown sugar
1/2 cup sugar
1 1/2 cup flour
3 cups oats
1 egg
2 tsp vanilla
2 tsps baking soda
1/2 tsp salt
1/4 tsp cinnamom

Heat oven to 375. Beat butter & sugar until creamy. Add egg & vanilla; mix well. Lightly spoon flour into dry measuring cup and level with flat knife edge. Combine flour, soda, salt & cinnamon in a bowl; stir. Add oats and mix well. Add to butter mix and blend well. Drop by rounded tablespoons, 2 inches apart on baking sheets lined with parchment paper. Bake for 10 min. Leave in pan to cool for 2 minutes. Put cookies on wire rack to finish cooling.

Creme Filling:
1/2 cup softened butter
2 cups powdered sugar
1-2 Tbsp whipping cream
1 tsp vanilla

Combine all in a medium bowl. Beat on low until mixed well. Then beat on high until light & fluffy.
Spread one tablespoon of filling between 2 cookies.