Puree the blackberries in a blender. After you puree the blackberries, leave them in the blender and add the water. Puree again so that most of the berry pulp separates from the seeds. Pour this mixture through a strainer into your large mixing bowl. This should separate the seeds from the berry pulp and water. Discard the seeds, since they are somewhat of an impediment to enjoying the cake.
Cool the cake before applying the frosting to the top. (Note: You may need to adjust the amount of water you add, depending on the brand of frozen blackberries you use. Some will have more juice than others.)
Place chocolate chips in a pan and melt on low. Stir until melted. Blend tofu, maple syrup, and water in a blender or food processor until smooth. Add the melted chocolate chips to the tofu mixture and blend until smooth.
This recipe is from Vegan Life Colorado members Matt & Ann.
Matt's Notes: Use only blackberries in this recipe and do not substitute another type of berry. Garnish with any fresh berries - blueberries, strawberries or blackberries.