food coloring and/or sprinklesoptional; used for decorating
Instructions
To make the cookies:
Prep: Preheat oven to 400°F. Line a baking sheet with a Silpat or parchment paper. Set aside.
Cream butter and sugar: In a stand mixer fitted with the paddle attachment, or in a large mixing bowl using a hand mixer, cream together the butter and sugar until smooth and light in color.
Mix wet ingredients: Add in the sour cream, eggs, vanilla extract, and additional flavored extract, if using. Mix until just combined.
Sift and add dry ingredients: In a separate mixing bowl, sift together the flour, baking powder, baking soda, and salt. Add the dry ingredients to the wet in three additions—mixing well after each.
Roll cookies: Roll dough into 2″ balls and place 2″ apart on the prepared cookie sheet. Use a roller (a mini roller works great) to roll cookies flat (about 1/4 to 1/2 inch thick).
Bake: Bake cookies in preheated oven for 7 minutes. They will not be brown when done. Remove from oven and transfer from cookie sheet to cooling rack. Allow cookies to fully cool before frosting.
To make the frosting:
Cream butter: In a stand mixer fitted with the paddle or in a large mixing bowl using a hand mixer, cream together the butter, vanilla, and extract (if using) until smooth.
Add sugar: Add in the powdered sugar, 1 cup at a time, mixing until smooth after each addition. Add in the milk and food color, if using, and beat until fluffy and smooth.
Decorate: Spread onto cooled cookies and immediately sprinkle on sprinkles.