Preheat the oven to 375°F (190°C) and line baking sheets with parchment paper.
Whisk together the cinnamon, ground ginger, cardamom, nutmeg, ground cloves and allspice spices and set ½ teaspoon aside for rolling the cookies.
In a medium bowl, whisk together flour, salt, baking soda and the rest of the spice mix.
Beat the vegan butter and sugars on medium-high speed until light and fluffy, about 2 minutes. On low speed, mix in the plant based milk and vanilla; the mixture will curdle slightly.
Add dry ingredients and mix on lowest speed just until combined. This will take about 20 seconds; it’s important to not overmix at this point.
Mix the final ⅓ cup of sugar (listed under "for rolling) with the reserved ½ teaspoon of spices for rolling the cookies.
Scoop 1.5 tablespoons of cookie dough and roll into a ball with your hands. Then roll it in the spiced sugar and place on the prepared cookie sheets. Repeat with the remaining dough. Leave about 2 inches of space between the cookies.
Bake in the preheated oven for 10-12 minutes, until the edges begin to brown lightly.
Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.
Notes
To store: Store chai sugar cookies in an airtight container at room temperature for up to a week.
To freeze: You can freeze chai sugar cookies either before or after baking for up to 3 months. If freezing before baking, roll the dough into balls and place them on a lined baking sheet. Freeze for an hour, then transfer to a freezer-safe container or bag. When ready to bake, remove from the freezer and let thaw in the fridge overnight before rolling in spiced sugar and baking as directed. If freezing after baking, allow the cookies to cool completely before placing them in a freezer-safe container or bag. When ready to enjoy, simply thaw at room temperature and serve.