In the bowl of a stand mixer, combine the softened butter and powdered sugar. Use the whisk attachment to mix on low speed for about a minute. Once combined, scrape down the sides and mix again. Bump up the speed to medium high for an additional 5 minutes. The mixture should be pale yellow in color and fluffy looking.

Add in the vanilla (or other flavoring of choice - almond, orange, vanilla beans) Mix well.

Add in the flour and cornstarch and mix well. Dough will be sticky.

Cover the bowl of dough with plastic wrap and place in the fridge for 1 hour or the freezer for 30 minutes until the dough is firm and no longer sticky.

Preheat the oven to 300°F. Line your baking sheets with parchment paper and set aside.

Scoop out a ball of dough about the size of a ping pong ball and roll into a sphere.

Place on the baking sheet about 2 inches apart.

Dip the prongs of a fork into the additional cornstarch and then press into the cookie to create an impression.

Decorate with the sprinkles. Repeat until all dough has been shaped and decorated.

Bake in the preheated oven for 20 minutes or just until the edges are set and just slightly browned.

Allow to cool for a few minutes before transferring to a wire rack to cool completely.