Christmas Cookies Recipe

Preheat your oven to 375°F (190°C) and line two baking sheets with parchment paper.
In a medium bowl, whisk together the flour, baking soda, and baking powder until well combined; set this dry mixture aside.
In a large bowl using an electric mixer, beat the softened butter and 1 1/2 cups of granulated sugar together on medium speed for about 2 minutes, until the mixture is light and fluffy.
Beat the egg and vanilla extract into the butter-sugar mixture until they are fully incorporated and the texture is smooth.
Gradually add the dry flour mixture to the wet ingredients, mixing on low speed just until a soft cookie dough forms and no streaks of flour remain.
Place the 1/2 cup of plain granulated sugar and the sparkling sugar in two separate small bowls. Roll tablespoon-sized portions of dough into balls, then roll each ball first in the plain sugar and then in the sparkling sugar to coat completely.
Place the dough balls about 2 inches apart on the prepared baking sheets and bake for 8 to 10 minutes, or until the edges are set and the bottoms are lightly golden.
Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely, which allows them to firm up.