For the Cookies:

1. Preheat the oven to 350°F. Line a baking sheet with parchment paper or a silicone baking sheet
2. In a large mixing bowl, combine all the ingredients together and mix until well combined. The dough will be thick.
3. Scoop the dough using a large cookie scoop and place on a baking sheet, 2 inches apart. Bake for 11-13 minutes. The center of the cookies should be slightly under-baked but not too gooey. Use a toothpick inserted into the center of a cookie to check for doneness. Cool completely before frosting.

For the Frosting:

1. Cut the butter into pieces. Using the paddle attachment, whip the butter for about 5 minutes, scraping down the bowl occasionally, and beating until the butter is whipped and fluffy.
2. Add the powdered sugar and vanilla extract and mix on low speed until incorporated into the butter, then increase the speed and beat for about 3 minutes or until whipped and fluffy; scrape down the bowl as needed.
3. Frost cookies with a flat knife and garnish with sprinkles.