Shortbread Cookies with Strawberry Frosting

Preheat oven to 350° F. Using the paddle attachment of a stand mixer, mix 1 cup of butter, 1 1/2 cups powdered sugar, and the flour on low speed until well combined. Roll into 1 inch balls and place on cookie sheet lined with parchment paper. Bake for 12 minutes. Let cookies cool completely. Meanwhile, using the paddle attachment of a stand mixer beat the other 1 cup of butter until fluffy. Add powdered sugar and beat on low speed until incorporated. Using a food processor (a Magic Bullet works great too), puree the strawberries. Pour pureed strawberries into frosting and beat on high speed for 4-5 minutes. Frost each cookie with a dollop of frosting and top with a sliced strawberry.