In a small bowl, mix the melted margarine and brown sugar together until it turns into a thick cream. Stir in the soy milk and vanilla.
In a larger bowl, mix together the flour, cocoa powder, baking powder, salt, and chocolate chips. Then pour the liquid mix into the dry mix and stir until thoroughly combined.
Pour the brownie batter into a greased 8×8″ glass pan, being careful not to eat too much of it en route. Bake at 350F for 25 minutes, then remove from the oven. Drink in the fresh-from-the-oven smell and appreciate life. See how long you can let the plant-based brownies cool before you dive in and start indulging. Happy chocolate enjoyment!