Place the dates in a small bowl and cover with hot water. Set aside for at least 10 minutes while you do the next few steps.
Preheat the oven to 350°F. Lightly grease an 8×8 baking pan. Set aside.
In a medium bowl, mix together the cocoa powder, sugar, cornstarch and salt. Set aside.
In a food processor, pulse together the dates, 1 teaspoon reserved water and the coconut oil until smooth.
In a small bowl, melt the chocolate in 30 second intervals, mixing after each interval. Mix in the vanilla and eggs.
Add the date mixture and the chocolate mixture into the dry ingredients until fully incorporated. Pour the batter into the prepared baking pan and place in the preheated oven for 15 minutes, or until a toothpick inserted into the centre comes out clean. Allow to cool, then cut into squares.