3/4cupcolored large crystal sanding sugar or colored sprinkles
Instructions
Place rack in center of the oven and pre-heat to 350 degrees.
Line cookie sheets with parchment or non-stick cooking mats.
Whisk flour, baking soda, cream of tartar and salt together in a small bowl.
In an electric mixer, beat butter and granulated sugar 2-4 minutes until fluffy.
Add egg and vanilla mixing to combine.
At low speed, add flour and mix until just combined.
Form dough into walnut-sized balls and gently roll in colored sugar or sprinkles.
Space cookies on the cookie sheet, leaving room for expansion.
Bake 8 minutes, remove pan and bang gently on top of the stove. Place back in the oven and bake for 7 minutes more. Remove and bang on the stovetop again. Let cookies set for 10 minutes before removing to wire rack to cool completely.