For the blackberry soy layer dessert, place one crushed cocoa cookie and two finely chopped blackberries in each of 2 tall glasses.
Drizzle 1 tablespoon eggnog over them, then layer half of the chocolate soy dessert on top of each.
Again, place one cocoa cookie, 2 blackberries and eggnog on top of each, then place half of the vanilla soy dessert on top of each, decorate with cookie and blackberry.