Combine all of the ingredients in a blender or food processor. Pulse a few times to break everything up. Then blend continuously until the ingredients have broken down and start to clump together into a ball.
Using a spatula to scrape down the sides, turn out the mixture onto a piece of wax paper or plastic wrap. Press into an even square and chill, wrapped, for at least an hour. Cut into desired size of bars, wrapping each bar in plastic wrap to store in the fridge