Preheat oven to 350* F. Line a baking sheet with parchment paper.
In a large bowl using a hand mixer, cream vegan butter and brown sugar until light and fluffy. Then, add the pumpkin puree, non-dairy milk, and vanilla and mix until combined.
8 tablespoon Non-Dairy Butter, room temperature, 1 Cup Light Brown Sugar, tightly packed, ⅓ Cup Canned Pumpkin Puree, 1 tablespoon Non-Dairy Milk, 2 teaspoon Vanilla Extract
Add flour, pumpkin pie spice, baking soda, and salt, and mix on low until just combined.
1 ⅔ Cup All-Purpose Flour, 2 ½ teaspoon Pumpkin Pie Spice, ½ teaspoon Baking Soda, ¼ teaspoon Kosher Salt
Use a 3-tablespoon cookie scoop to scoop mounds of dough onto a parchment-lined baking sheet, leaving at least 3 inches of space between each cookie.
Then, bake in a 350* F oven for 11-13 minutes, or until the cookies are just starting to brown around the edges. Allow the cookies to cook on the baking sheet for 5 minutes, then transer them to a wire rack to continue cooling. Repeat with the remaining cookie dough.