In the bowl of a stand mixer fitted with the paddle attachment or in a large mixing bowl using a hand mixer, cream the non-dairy butter and granulated sugar until well combined and fluffy.
8 tablespoon Non-Dairy Butter, ¾ Cup Granulated Sugar
Then, add the non-dairy milk and vanilla and mix no low to combine.
2 tablespoon Non-Dairy Milk, 2 teaspoon Vanilla Extract
Add the flour, baking powder, and salt, and mix until it forms a dough. The dough should stick together when lightly pressed.
2 Cups All-Purpose Flour, ½ teaspoon Baking Powder, ¼ teaspoon Kosher Salt
Scrape the dough onto a large sheet of plastic wrap and form it into a flat disc. The flatter you make the disc, the easier it will be to roll the dough out! Then, place the disc into the refrigerator for at least two hours, or up to 3 days.
Preheat oven to 350*F and line 2 baking sheets with parchment paper.
Remove dough from the refrigerator. Lightly flour your work surface as well as a rolling pin. Roll the dough out to ¼ inch thickness. Then, use cookie cutters to cut shapes out and transfer the cookies to a lined baking sheet, leaving 2 inches of space between each cookie. (See Note!)
Press the cookie dough scraps back into a disc and roll out again immediately. Then, continue pressing into a disc and rolling back out until the dough is gone.
If you want to decorate with colored sugar, cinnamon, or turbinado sugar, sprinkle the cookies with them before baking. If you want to ice the cookies with royal icing, leave them plain and bake the cookies, one tray at a time, in a 350*F oven for 11-13 minutes or until the edges are just barely golden brown.
Turbinado Sugar, Cinnamon, Nutmeg, Colored Sugar
Allow to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely before decorating.