INGREDIENTS
1
Egg, large
1 1/2 cups
All-purpose flour
1 tsp
Baking powder
1/2 tsp
Baking soda
1 tsp
Cream of tartar
1/4 tsp
Salt
3/4 cup
Sugar
1 tsp
Vanilla extract
1/2 cup
Butter, unsalted
⅓ cup sprinkles (Christmas colors), plus more for topping the cookie dough