In a food processor or blender, crush the Oreos until they are ground (there can be a few small pieces uncrashed). Or you can put them into a zip-lock bag, place them on a flat surface, and roll over them with a rolling pin until they are crushed. Save some cookie crumbs for the topping.
In a mixing bowl, whisk together vegan sour cream and granulated sugar until combined. Then take about ¾ cup of mixture and mix it with cocoa powder in a separate bowl.
To a small baking dish**, add about half of the crushed Oreos and evenly distribute them. Next, add ½ of the light sour cream mixture on top of the Oreo layer and spread it evenly. Add another layer of remaining crushed Oreos. Then spread the chocolate sour cream mixture over top of the Oreo layer, following by the rest of the light sour cream mixture. Sprinkle the top with crushed Oreos that you have put aside.
Cover the Oreo lasagna and place in the fridge for at least 4 hours or overnight before serving.
Enjoy!