Preheat the oven to 275°F. ( you will need to bake the cookies in batches)
In the bowl of a stand mixer fitted with the paddle attachment or in a large bowl using an electric mixer, beat together the butter and icing sugar until smooth and creamy.
Slowly add the flour, beating constantly, until all the flour is incorporated. Whip the shortbread mixture for 6 minutes on medium speed, scraping the sides and bottom of the bowl with a spatula every 2 minutes.
Use a small cookie scoop or a Tablespoon to scoop the dough onto two ungreased baking sheets. Top with candied cherries or sprinkles if desired.
Bake for 30 to 35 minutes, until the bottoms are nicely browned. Remove from oven and carefully transfer to wire racks to cool completely.
Store for 2 to 3 days at room temperature in a closed container or freeze in a closed container for 4 to 5 months.
Video
Notes
You can top this whipped shortbread with whatever sprinkles or cherries you prefer!