Preheat the oven to 400 degrees and lightly grease a large baking sheet (or line with parchment paper).

In a large bowl, combine the flour, brown sugar, pumpkin pie spice mix, baking powder, baking soda and salt. Add the cold vegan butter, and use a pastry cutter or your hands to work the butter into the dry ingredients. It should resemble coarse crumbs.

Now dump in the pumpkin puree, oatmilk, and vanilla. Mix until a soft dough forms.

On a lightly floured surface, knead the dough a few times until it comes together. Flatten the dough with your hands (lightly flour your hands if sticky). Flatten it into a circle, about 1 inch thick.

Using a pizza cutter or large knife, cut it like you would a pizza, into 8 pieces.

Place on prepared baking sheet and bake for 14-16 minutes, until lightly golden brown on top.