In a large mixing bowl, cream together the vegan butter, brown sugar, and white sugar until light and fluffy.
Add the sourdough discard and vanila extract, and mix until JUST combined. Avoid overmixing.
In another bowl, sift together all-purpose flour, baking powder, and baking soda. Add half of the dry mix to the mixing bowl with your wet ingredients, stir until just combined, then add the remainder of the flour mixture. Do not overmix.
Add the chocolate chips and stir until incorporated. Cover and let chill in the fridge for at least 30 minutes so the dough can relax.
Preheat oven to 350F (180C) while cookies rest in the fridge.
Use a 1.5 tbsp cookie scoop to portion out cookie dough balls on a lined baking sheet, leaving about 2 inches between each dough ball. Sprinkle with some flakey sea salt (like Maldon) on top, and then bake for 10-12 minutes. 10 min will yield a very soft, chewy cookie, 12 min will yield crisp edges with a chewy centre. Bake according to your preference :)
Remove from oven after 10-12 min and let rest on the baking sheet for 2 minutes, then transfer to a wire rack to cool.
Bake the remaining cookie balls (you should get about 36 cookies).
Enjoy!