01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper and set aside.
02 - In a medium bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt until evenly distributed.
03 - In a large bowl, beat the softened vegan butter and granulated sugar together using an electric mixer or whisk until the mixture is light and creamy.
04 - Add the non-dairy milk, vanilla extract, and peppermint extract to the butter-sugar mixture. Mix until smooth and fully combined.
05 - Gradually fold the dry ingredient mixture into the wet ingredients until just combined. Be careful not to overmix, as this can make the cookies tough.
06 - Scoop tablespoon-sized portions of dough and roll them into balls. Roll each ball in the extra granulated sugar to coat evenly.
07 - Place the coated dough balls onto the prepared baking sheets, spacing them about 2 inches apart. Gently flatten each ball with your palm or the bottom of a glass.
08 - Bake for 9 to 11 minutes, until the edges are set but the centers remain soft. Avoid overbaking for the best chewy texture.
09 - Allow the cookies to cool on the baking sheets for 5 minutes, then transfer them to a wire rack to cool completely before serving or storing.