Grease or line an 8x8 baking pan. Preheat oven to 350F.
In a food processor or blender, puree the Jooliettes Date Nibbles Sea Salt Dark Chocolate and hot water until smooth. Measure out a cup of the paste and transfer to a large bowl with the butter.
Cream the butter and date paste until smooth.
Add the eggs, one at a time and vanilla extract, mixing until fluffy and smooth.
Add the cocoa and flour, and mix on low until well combined.
Spread batter into prepared pan, smoothing with the back of a spoon. Sprinkle a little sea salt on top.